From f77724ff7407c3eca2a6ef1f8ebab08a1669f868 Mon Sep 17 00:00:00 2001
From: Sai Cheemalapati <saicheems@gmail.com>
Date: Mon, 7 Nov 2016 11:16:31 -0800
Subject: [PATCH] Refactor PHP discovery snippetgen for MVVM (#714)

---
 .../MainDiscoveryProviderFactory.java         |   14 +-
 .../ApiaryConfigToSampleConfigConverter.java  |    1 +
 .../discovery/config/SampleConfig.java        |   11 +
 .../config/php/PhpTypeNameGenerator.java      |   71 +
 .../config/ruby/RubyTypeNameGenerator.java    |   10 -
 .../discovery/transformer/SampleNamer.java    |    4 +-
 .../JavaSampleMethodToViewTransformer.java    |    2 +-
 .../nodejs/NodeJSSampleTypeNameConverter.java |    7 +-
 .../php/PhpSampleMethodToViewTransformer.java |  175 +
 .../transformer/php/PhpSampleNamer.java       |   31 +
 .../php/PhpSampleTypeNameConverter.java       |  105 +
 .../discovery/viewmodel/SampleView.java       |    6 +
 .../api/codegen/util/php/PhpTypeTable.java    |   76 +
 .../api/codegen/util/ruby/RubyTypeTable.java  |    2 +-
 .../com/google/api/codegen/php/sample.snip    |  146 +
 .../java_storagetransfer.v1.json.baseline     |    6 +-
 .../php_adexchangebuyer.v1.4.json.baseline    |  533 +--
 .../php/php_appengine.v1beta5.json.baseline   |  340 +-
 .../php/php_bigquery.v2.json.baseline         |  372 +-
 .../php/php_cloudbilling.v1.json.baseline     |   83 +-
 .../php/php_clouddebugger.v2.json.baseline    |  109 +-
 .../php_cloudmonitoring.v2beta2.json.baseline |  121 +-
 .../php_cloudresourcemanager.v1.json.baseline |  234 +-
 .../php/php_cloudtrace.v1.json.baseline       |   47 +-
 .../php_clouduseraccounts.beta.json.baseline  |  274 +-
 .../php/php_compute.v1.json.baseline          | 3969 ++++++-----------
 .../php/php_container.v1.json.baseline        |  209 +-
 .../php/php_dataflow.v1b3.json.baseline       |  206 +-
 .../php/php_datastore.v1.json.baseline        |   96 +-
 .../php_deploymentmanager.v2.json.baseline    |  298 +-
 .../php/php_dfareporting.v2.6.json.baseline   | 3129 +++++--------
 .../discoveries/php/php_dns.v1.json.baseline  |  155 +-
 .../php/php_logging.v2beta1.json.baseline     |  256 +-
 .../php/php_prediction.v1.6.json.baseline     |  130 +-
 .../php/php_pubsub.v1.json.baseline           |  395 +-
 ...p_replicapoolupdater.v1beta1.json.baseline |  185 +-
 .../php/php_sqladmin.v1beta4.json.baseline    |  664 +--
 .../php/php_storage.v1.json.baseline          |  614 +--
 .../php/php_storagetransfer.v1.json.baseline  |  164 +-
 .../php/php_taskqueue.v1beta2.json.baseline   |  142 +-
 .../php/php_translate.v2.json.baseline        |   27 +-
 .../php/php_vision.v1.json.baseline           |   11 +-
 .../ruby/ruby_sqladmin.v1beta4.json.baseline  |   10 +-
 .../sqladmin.v1beta4.json.overrides           |   14 +-
 .../discoveries/storage.v1.json.overrides     |   82 +
 .../storagetransfer.v1.json.overrides         |   24 +-
 46 files changed, 5248 insertions(+), 8312 deletions(-)
 create mode 100644 src/main/java/com/google/api/codegen/discovery/config/php/PhpTypeNameGenerator.java
 create mode 100644 src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleMethodToViewTransformer.java
 create mode 100644 src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleNamer.java
 create mode 100644 src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleTypeNameConverter.java
 create mode 100644 src/main/resources/com/google/api/codegen/php/sample.snip

diff --git a/src/main/java/com/google/api/codegen/discovery/MainDiscoveryProviderFactory.java b/src/main/java/com/google/api/codegen/discovery/MainDiscoveryProviderFactory.java
index f2af591255..116c98e65f 100644
--- a/src/main/java/com/google/api/codegen/discovery/MainDiscoveryProviderFactory.java
+++ b/src/main/java/com/google/api/codegen/discovery/MainDiscoveryProviderFactory.java
@@ -24,14 +24,14 @@
 import com.google.api.codegen.discovery.config.go.GoTypeNameGenerator;
 import com.google.api.codegen.discovery.config.java.JavaTypeNameGenerator;
 import com.google.api.codegen.discovery.config.nodejs.NodeJSTypeNameGenerator;
+import com.google.api.codegen.discovery.config.php.PhpTypeNameGenerator;
 import com.google.api.codegen.discovery.config.ruby.RubyTypeNameGenerator;
 import com.google.api.codegen.discovery.transformer.SampleMethodToViewTransformer;
 import com.google.api.codegen.discovery.transformer.go.GoSampleMethodToViewTransformer;
 import com.google.api.codegen.discovery.transformer.java.JavaSampleMethodToViewTransformer;
 import com.google.api.codegen.discovery.transformer.nodejs.NodeJSSampleMethodToViewTransformer;
+import com.google.api.codegen.discovery.transformer.php.PhpSampleMethodToViewTransformer;
 import com.google.api.codegen.discovery.transformer.ruby.RubySampleMethodToViewTransformer;
-import com.google.api.codegen.php.PhpDiscoveryContext;
-import com.google.api.codegen.php.PhpSnippetSetRunner;
 import com.google.api.codegen.py.PythonDiscoveryContext;
 import com.google.api.codegen.py.PythonDiscoveryInitializer;
 import com.google.api.codegen.py.PythonSnippetSetRunner;
@@ -63,12 +63,14 @@ public class MainDiscoveryProviderFactory implements DiscoveryProviderFactory {
               GO, GoSampleMethodToViewTransformer.class,
               JAVA, JavaSampleMethodToViewTransformer.class,
               NODEJS, NodeJSSampleMethodToViewTransformer.class,
+              PHP, PhpSampleMethodToViewTransformer.class,
               RUBY, RubySampleMethodToViewTransformer.class);
   private static final Map<String, Class<? extends TypeNameGenerator>> TYPE_NAME_GENERATOR_MAP =
       ImmutableMap.of(
           GO, GoTypeNameGenerator.class,
           JAVA, JavaTypeNameGenerator.class,
           NODEJS, NodeJSTypeNameGenerator.class,
+          PHP, PhpTypeNameGenerator.class,
           RUBY, RubyTypeNameGenerator.class);
 
   public static DiscoveryProvider defaultCreate(
@@ -90,14 +92,6 @@ public static DiscoveryProvider defaultCreate(
           .setSnippetFileName(id + "/" + DEFAULT_SNIPPET_FILE)
           .build();
 
-    } else if (id.equals(PHP)) {
-      return CommonDiscoveryProvider.newBuilder()
-          .setContext(new PhpDiscoveryContext(service, apiaryConfig))
-          .setSnippetSetRunner(
-              new PhpSnippetSetRunner<Method>(SnippetSetRunner.SNIPPET_RESOURCE_ROOT))
-          .setSnippetFileName(id + "/" + DEFAULT_SNIPPET_FILE)
-          .build();
-
     } else if (id.equals(PYTHON)) {
       return CommonDiscoveryProvider.newBuilder()
           .setContext(new PythonDiscoveryContext(service, apiaryConfig))
diff --git a/src/main/java/com/google/api/codegen/discovery/config/ApiaryConfigToSampleConfigConverter.java b/src/main/java/com/google/api/codegen/discovery/config/ApiaryConfigToSampleConfigConverter.java
index d7e45692e6..70ffdd7ce0 100644
--- a/src/main/java/com/google/api/codegen/discovery/config/ApiaryConfigToSampleConfigConverter.java
+++ b/src/main/java/com/google/api/codegen/discovery/config/ApiaryConfigToSampleConfigConverter.java
@@ -66,6 +66,7 @@ public SampleConfig convert() {
     String apiTypeName = typeNameGenerator.getApiTypeName(apiaryConfig.getServiceCanonicalName());
     return SampleConfig.newBuilder()
         .apiTitle(apiaryConfig.getApiTitle())
+        .apiCanonicalName(apiaryConfig.getServiceCanonicalName())
         .apiName(apiName)
         .apiVersion(apiVersion)
         .apiTypeName(apiTypeName)
diff --git a/src/main/java/com/google/api/codegen/discovery/config/SampleConfig.java b/src/main/java/com/google/api/codegen/discovery/config/SampleConfig.java
index f32fec729b..ca0926efb3 100644
--- a/src/main/java/com/google/api/codegen/discovery/config/SampleConfig.java
+++ b/src/main/java/com/google/api/codegen/discovery/config/SampleConfig.java
@@ -60,6 +60,14 @@ public abstract class SampleConfig {
   @JsonProperty("apiTitle")
   public abstract String apiTitle();
 
+  /**
+   * Returns the API's canonical name.
+   *
+   * <p>For example: "Ad Exchange Buyer"
+   */
+  @JsonProperty("apiCanonicalName")
+  public abstract String apiCanonicalName();
+
   /**
    * Returns the API's name.
    *
@@ -109,6 +117,9 @@ public abstract static class Builder {
     @JsonProperty("apiTitle")
     public abstract Builder apiTitle(String val);
 
+    @JsonProperty("apiCanonicalName")
+    public abstract Builder apiCanonicalName(String val);
+
     @JsonProperty("apiName")
     public abstract Builder apiName(String val);
 
diff --git a/src/main/java/com/google/api/codegen/discovery/config/php/PhpTypeNameGenerator.java b/src/main/java/com/google/api/codegen/discovery/config/php/PhpTypeNameGenerator.java
new file mode 100644
index 0000000000..4b3e06bcbf
--- /dev/null
+++ b/src/main/java/com/google/api/codegen/discovery/config/php/PhpTypeNameGenerator.java
@@ -0,0 +1,71 @@
+/* Copyright 2016 Google Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.api.codegen.discovery.config.php;
+
+import com.google.api.codegen.discovery.config.TypeNameGenerator;
+import com.google.api.codegen.util.Name;
+import com.google.common.base.Joiner;
+import com.google.common.collect.ImmutableSet;
+import java.util.ArrayList;
+import java.util.List;
+
+public class PhpTypeNameGenerator extends TypeNameGenerator {
+
+  /**
+   * Set of method names that must have the previous name components as upper-camel suffixes.
+   *
+   * <p>For example: "foo.bar.list" to "foo.bar.listFooBar"
+   */
+  ImmutableSet<String> RENAMED_METHODS = ImmutableSet.of("list", "clone");
+
+  @Override
+  public String stringDelimiter() {
+    return "'";
+  }
+
+  @Override
+  public String getApiTypeName(String apiName) {
+    return "Google_Service_" + apiName.replace(" ", "");
+  }
+
+  @Override
+  public List<String> getMethodNameComponents(List<String> nameComponents) {
+    ArrayList<String> out = new ArrayList<>();
+
+    nameComponents = super.getMethodNameComponents(nameComponents);
+    String verb = nameComponents.remove(nameComponents.size() - 1); // Pop the last element.
+    if (RENAMED_METHODS.contains(verb)) {
+      for (String s : nameComponents) {
+        verb += Name.lowerCamel(s).toUpperCamel();
+      }
+    }
+    // If there are multiple resources before the verb, they're joined on '_'.
+    // Ex: "$service->billingAccounts_projects->listBillingAccountsProjects"
+    if (nameComponents.size() > 1) {
+      out.add(Joiner.on('_').join(nameComponents));
+    } else if (nameComponents.size() == 1) {
+      out.add(nameComponents.get(0));
+    }
+    out.add(verb);
+    return out;
+  }
+
+  @Override
+  public String getMessageTypeName(String messageTypeName) {
+    // Avoid cases like "DatasetList.Datasets"
+    String pieces[] = messageTypeName.split("\\.");
+    return pieces[pieces.length - 1];
+  }
+}
diff --git a/src/main/java/com/google/api/codegen/discovery/config/ruby/RubyTypeNameGenerator.java b/src/main/java/com/google/api/codegen/discovery/config/ruby/RubyTypeNameGenerator.java
index b4bae15fd1..c75b97e725 100644
--- a/src/main/java/com/google/api/codegen/discovery/config/ruby/RubyTypeNameGenerator.java
+++ b/src/main/java/com/google/api/codegen/discovery/config/ruby/RubyTypeNameGenerator.java
@@ -14,7 +14,6 @@
  */
 package com.google.api.codegen.discovery.config.ruby;
 
-import com.google.api.codegen.DiscoveryImporter;
 import com.google.api.codegen.discovery.config.TypeNameGenerator;
 import com.google.api.codegen.ruby.RubyApiaryNameMap;
 import com.google.api.codegen.util.Name;
@@ -89,15 +88,6 @@ public String getApiTypeName(String apiName) {
     return Name.upperCamel(apiName.replace(" ", ""), "Service").toUpperCamel();
   }
 
-  @Override
-  public String getResponseTypeUrl(String responseTypeUrl) {
-    if (responseTypeUrl.equals(DiscoveryImporter.EMPTY_TYPE_NAME)
-        || responseTypeUrl.equals(DiscoveryImporter.EMPTY_TYPE_URL)) {
-      return "";
-    }
-    return responseTypeUrl;
-  }
-
   @Override
   public String getMessageTypeName(String messageTypeName) {
     // Avoid cases like "DatasetList.Datasets"
diff --git a/src/main/java/com/google/api/codegen/discovery/transformer/SampleNamer.java b/src/main/java/com/google/api/codegen/discovery/transformer/SampleNamer.java
index 3cfa5102ff..0e35933128 100644
--- a/src/main/java/com/google/api/codegen/discovery/transformer/SampleNamer.java
+++ b/src/main/java/com/google/api/codegen/discovery/transformer/SampleNamer.java
@@ -27,8 +27,8 @@ public SampleNamer(NameFormatter nameFormatter) {
   }
 
   /** Returns the application name of the sample. */
-  public String getSampleApplicationName(String apiTypeName) {
-    return "Google-" + apiTypeName + "Sample/0.1";
+  public String getSampleApplicationName(String apiCanonicalName) {
+    return "Google-" + apiCanonicalName.replace(" ", "") + "Sample/0.1";
   }
 
   /** Returns the class name of the sample. */
diff --git a/src/main/java/com/google/api/codegen/discovery/transformer/java/JavaSampleMethodToViewTransformer.java b/src/main/java/com/google/api/codegen/discovery/transformer/java/JavaSampleMethodToViewTransformer.java
index e65f3a9dab..b576f43279 100644
--- a/src/main/java/com/google/api/codegen/discovery/transformer/java/JavaSampleMethodToViewTransformer.java
+++ b/src/main/java/com/google/api/codegen/discovery/transformer/java/JavaSampleMethodToViewTransformer.java
@@ -117,7 +117,7 @@ private SampleView createSampleView(SampleTransformerContext context) {
         .apiTitle(config.apiTitle())
         .apiName(config.apiName())
         .apiVersion(config.apiVersion())
-        .appName(namer.getSampleApplicationName(config.apiTypeName()))
+        .appName(namer.getSampleApplicationName(config.apiCanonicalName()))
         .className(namer.getSampleClassName(config.apiTypeName()))
         .imports(imports)
         .auth(createSampleAuthView(context))
diff --git a/src/main/java/com/google/api/codegen/discovery/transformer/nodejs/NodeJSSampleTypeNameConverter.java b/src/main/java/com/google/api/codegen/discovery/transformer/nodejs/NodeJSSampleTypeNameConverter.java
index f1ae3c52f7..105719235b 100644
--- a/src/main/java/com/google/api/codegen/discovery/transformer/nodejs/NodeJSSampleTypeNameConverter.java
+++ b/src/main/java/com/google/api/codegen/discovery/transformer/nodejs/NodeJSSampleTypeNameConverter.java
@@ -26,7 +26,6 @@ public class NodeJSSampleTypeNameConverter implements SampleTypeNameConverter {
   /** A map from primitive types in proto to NodeJS counterparts. */
   private static final ImmutableMap<Field.Kind, String> PRIMITIVE_TYPE_MAP =
       ImmutableMap.<Field.Kind, String>builder()
-          .put(Field.Kind.TYPE_UNKNOWN, "Object")
           .put(Field.Kind.TYPE_BOOL, "boolean")
           .put(Field.Kind.TYPE_INT32, "number")
           .put(Field.Kind.TYPE_INT64, "number")
@@ -41,7 +40,6 @@ public class NodeJSSampleTypeNameConverter implements SampleTypeNameConverter {
   /** A map from primitive types in proto to zero value in NodeJS */
   private static final ImmutableMap<Field.Kind, String> PRIMITIVE_ZERO_VALUE =
       ImmutableMap.<Field.Kind, String>builder()
-          .put(Field.Kind.TYPE_UNKNOWN, "{}")
           .put(Field.Kind.TYPE_BOOL, "false")
           .put(Field.Kind.TYPE_INT32, "0")
           .put(Field.Kind.TYPE_INT64, "''")
@@ -80,6 +78,9 @@ public TypeName getTypeName(TypeInfo typeInfo) {
 
   @Override
   public TypeName getTypeNameForElementType(TypeInfo typeInfo) {
+    if (typeInfo.kind() == Field.Kind.TYPE_UNKNOWN) {
+      return new TypeName("Object");
+    }
     String primitiveTypeName = PRIMITIVE_TYPE_MAP.get(typeInfo.kind());
     if (primitiveTypeName != null) {
       return new TypeName(primitiveTypeName);
@@ -90,7 +91,7 @@ public TypeName getTypeNameForElementType(TypeInfo typeInfo) {
   @Override
   public TypedValue getZeroValue(TypeInfo typeInfo) {
     // Don't call getTypeName; we don't need to import these.
-    if (typeInfo.isMap()) {
+    if (typeInfo.isMap() || typeInfo.kind() == Field.Kind.TYPE_UNKNOWN) {
       return TypedValue.create(new TypeName("Object"), "{}");
     }
     if (typeInfo.isArray()) {
diff --git a/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleMethodToViewTransformer.java b/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleMethodToViewTransformer.java
new file mode 100644
index 0000000000..661d8cccb5
--- /dev/null
+++ b/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleMethodToViewTransformer.java
@@ -0,0 +1,175 @@
+/* Copyright 2016 Google Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.api.codegen.discovery.transformer.php;
+
+import com.google.api.codegen.discovery.config.FieldInfo;
+import com.google.api.codegen.discovery.config.MethodInfo;
+import com.google.api.codegen.discovery.config.SampleConfig;
+import com.google.api.codegen.discovery.transformer.SampleMethodToViewTransformer;
+import com.google.api.codegen.discovery.transformer.SampleNamer;
+import com.google.api.codegen.discovery.transformer.SampleTransformerContext;
+import com.google.api.codegen.discovery.transformer.SampleTypeTable;
+import com.google.api.codegen.discovery.viewmodel.SampleAuthView;
+import com.google.api.codegen.discovery.viewmodel.SampleFieldView;
+import com.google.api.codegen.discovery.viewmodel.SamplePageStreamingView;
+import com.google.api.codegen.discovery.viewmodel.SampleView;
+import com.google.api.codegen.util.Name;
+import com.google.api.codegen.util.SymbolTable;
+import com.google.api.codegen.util.php.PhpTypeTable;
+import com.google.api.codegen.viewmodel.ViewModel;
+import com.google.protobuf.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+public class PhpSampleMethodToViewTransformer implements SampleMethodToViewTransformer {
+
+  private static final String TEMPLATE_FILENAME = "php/sample.snip";
+
+  public PhpSampleMethodToViewTransformer() {}
+
+  @Override
+  public ViewModel transform(Method method, SampleConfig config) {
+    SampleTypeTable typeTable =
+        new SampleTypeTable(
+            new PhpTypeTable(""), new PhpSampleTypeNameConverter(config.apiTypeName()));
+    SampleNamer namer = new PhpSampleNamer();
+    SampleTransformerContext context =
+        SampleTransformerContext.create(config, typeTable, namer, method.getName());
+    return createSampleView(context);
+  }
+
+  private SampleView createSampleView(SampleTransformerContext context) {
+    SampleConfig config = context.getSampleConfig();
+    MethodInfo methodInfo = config.methods().get(context.getMethodName());
+    SampleNamer namer = context.getSampleNamer();
+    SampleTypeTable typeTable = context.getSampleTypeTable();
+    SymbolTable symbolTable = SymbolTable.fromSeed(PhpTypeTable.RESERVED_IDENTIFIER_SET);
+
+    SampleView.Builder builder = SampleView.newBuilder();
+
+    String serviceVarName = symbolTable.getNewSymbol(namer.getServiceVarName(config.apiTypeName()));
+    String serviceTypeName = typeTable.getServiceTypeName(config.apiTypeName()).getNickname();
+
+    if (methodInfo.isPageStreaming()) {
+      builder.pageStreaming(createSamplePageStreamingView(context, symbolTable));
+    }
+
+    // Created before the fields in-case there are naming conflicts in the symbol table.
+    SampleAuthView sampleAuthView = createSampleAuthView(context);
+
+    List<SampleFieldView> fields = new ArrayList<>();
+    List<String> fieldVarNames = new ArrayList<>();
+    for (FieldInfo field : methodInfo.fields().values()) {
+      SampleFieldView sampleFieldView =
+          SampleFieldView.newBuilder()
+              .name(namer.localVarName(Name.lowerCamel(field.name())))
+              .defaultValue(typeTable.getZeroValueAndSaveNicknameFor(field.type()))
+              .example(field.example())
+              .description(field.description())
+              .build();
+      fields.add(sampleFieldView);
+      fieldVarNames.add(sampleFieldView.name());
+    }
+
+    boolean hasRequestBody = methodInfo.requestBodyType() != null;
+    if (hasRequestBody) {
+      String requestBodyVarName = symbolTable.getNewSymbol(namer.getRequestBodyVarName());
+      builder.requestBodyVarName(requestBodyVarName);
+      builder.requestBodyTypeName(
+          typeTable.getTypeName(methodInfo.requestBodyType()).getNickname());
+      fieldVarNames.add(requestBodyVarName);
+    }
+
+    boolean hasResponse = methodInfo.responseType() != null;
+    if (hasResponse) {
+      builder.responseVarName(symbolTable.getNewSymbol(namer.getResponseVarName()));
+    }
+
+    String optParamsVarName = "";
+    if (methodInfo.isPageStreaming() || methodInfo.hasMediaDownload()) {
+      optParamsVarName = namer.localVarName(Name.lowerCamel("optParams"));
+      fieldVarNames.add(optParamsVarName);
+    }
+
+    return builder
+        .templateFileName(TEMPLATE_FILENAME)
+        .outputPath(context.getMethodName() + ".frag.php")
+        .apiTitle(config.apiTitle())
+        .apiName(config.apiName())
+        .apiVersion(config.apiVersion())
+        .appName(namer.getSampleApplicationName(config.apiCanonicalName()))
+        .auth(sampleAuthView)
+        .serviceVarName(serviceVarName)
+        .serviceTypeName(serviceTypeName)
+        .methodVerb(methodInfo.verb())
+        .methodNameComponents(methodInfo.nameComponents())
+        .hasRequestBody(hasRequestBody)
+        .hasResponse(hasResponse)
+        .fields(fields)
+        .fieldVarNames(fieldVarNames)
+        .isPageStreaming(methodInfo.isPageStreaming())
+        .hasMediaUpload(methodInfo.hasMediaUpload())
+        .hasMediaDownload(methodInfo.hasMediaDownload())
+        .clientVarName(namer.localVarName(Name.lowerCamel("client")))
+        .optParamsVarName(optParamsVarName)
+        .build();
+  }
+
+  private SampleAuthView createSampleAuthView(SampleTransformerContext context) {
+    SampleConfig config = context.getSampleConfig();
+    MethodInfo methodInfo = config.methods().get(context.getMethodName());
+
+    return SampleAuthView.newBuilder()
+        .type(config.authType())
+        .instructionsUrl(config.authInstructionsUrl())
+        .scopes(methodInfo.authScopes())
+        .isScopesSingular(methodInfo.authScopes().size() == 1)
+        .build();
+  }
+
+  private SamplePageStreamingView createSamplePageStreamingView(
+      SampleTransformerContext context, SymbolTable symbolTable) {
+    MethodInfo methodInfo = context.getSampleConfig().methods().get(context.getMethodName());
+    FieldInfo fieldInfo = methodInfo.pageStreamingResourceField();
+    SampleNamer namer = context.getSampleNamer();
+    if (fieldInfo == null) {
+      throw new IllegalArgumentException("pageStreamingResourceField cannot be null");
+    }
+
+    SamplePageStreamingView.Builder builder = SamplePageStreamingView.newBuilder();
+
+    builder.resourceFieldName(namer.publicFieldName(Name.lowerCamel(fieldInfo.name())));
+    if (fieldInfo.type().isMap()) {
+      // Assume that the value in the map is a message.
+      if (!fieldInfo.type().mapValue().isMessage()) {
+        throw new IllegalArgumentException("expected map value to be a message");
+      }
+      builder.resourceKeyVarName(
+          symbolTable.getNewSymbol(namer.localVarName(Name.lowerCamel("name"))));
+      String resourceValueVarName =
+          namer.localVarName(Name.upperCamel(fieldInfo.type().mapValue().message().typeName()));
+      builder.resourceValueVarName(symbolTable.getNewSymbol(resourceValueVarName));
+    } else {
+      String resourceVarName =
+          namer.getResourceVarName(
+              fieldInfo.type().isMessage() ? fieldInfo.type().message().typeName() : "");
+      builder.resourceVarName(symbolTable.getNewSymbol(resourceVarName));
+    }
+    builder.isResourceMap(fieldInfo.type().isMap());
+    builder.pageVarName(
+        symbolTable.getNewSymbol(namer.localVarName(Name.lowerCamel(fieldInfo.name()))));
+    return builder.build();
+  }
+}
diff --git a/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleNamer.java b/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleNamer.java
new file mode 100644
index 0000000000..840e234d54
--- /dev/null
+++ b/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleNamer.java
@@ -0,0 +1,31 @@
+/* Copyright 2016 Google Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.api.codegen.discovery.transformer.php;
+
+import com.google.api.codegen.discovery.transformer.SampleNamer;
+import com.google.api.codegen.util.Name;
+import com.google.api.codegen.util.php.PhpNameFormatter;
+
+public class PhpSampleNamer extends SampleNamer {
+
+  public PhpSampleNamer() {
+    super(new PhpNameFormatter());
+  }
+
+  @Override
+  public String getServiceVarName(String apiTypeName) {
+    return localVarName(Name.lowerCamel("service"));
+  }
+}
diff --git a/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleTypeNameConverter.java b/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleTypeNameConverter.java
new file mode 100644
index 0000000000..caeb34ec79
--- /dev/null
+++ b/src/main/java/com/google/api/codegen/discovery/transformer/php/PhpSampleTypeNameConverter.java
@@ -0,0 +1,105 @@
+/* Copyright 2016 Google Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.api.codegen.discovery.transformer.php;
+
+import com.google.api.codegen.discovery.config.TypeInfo;
+import com.google.api.codegen.discovery.transformer.SampleTypeNameConverter;
+import com.google.api.codegen.util.TypeName;
+import com.google.api.codegen.util.TypedValue;
+import com.google.common.collect.ImmutableMap;
+import com.google.protobuf.Field;
+
+public class PhpSampleTypeNameConverter implements SampleTypeNameConverter {
+
+  /** A map from primitive types in proto to PHP counterparts. */
+  private static final ImmutableMap<Field.Kind, String> PRIMITIVE_TYPE_MAP =
+      ImmutableMap.<Field.Kind, String>builder()
+          .put(Field.Kind.TYPE_BOOL, "Boolean")
+          .put(Field.Kind.TYPE_INT32, "Integer")
+          .put(Field.Kind.TYPE_INT64, "String")
+          .put(Field.Kind.TYPE_UINT32, "Integer")
+          .put(Field.Kind.TYPE_UINT64, "String")
+          .put(Field.Kind.TYPE_FLOAT, "Float")
+          .put(Field.Kind.TYPE_DOUBLE, "Float")
+          .put(Field.Kind.TYPE_STRING, "String")
+          .put(Field.Kind.TYPE_ENUM, "String")
+          .build();
+
+  /** A map from primitive types in proto to zero value in PHP */
+  private static final ImmutableMap<Field.Kind, String> PRIMITIVE_ZERO_VALUE =
+      ImmutableMap.<Field.Kind, String>builder()
+          .put(Field.Kind.TYPE_BOOL, "false")
+          .put(Field.Kind.TYPE_INT32, "0")
+          .put(Field.Kind.TYPE_INT64, "'0'")
+          .put(Field.Kind.TYPE_UINT32, "0")
+          .put(Field.Kind.TYPE_UINT64, "'0'")
+          .put(Field.Kind.TYPE_FLOAT, "0.0")
+          .put(Field.Kind.TYPE_DOUBLE, "0.0")
+          .put(Field.Kind.TYPE_STRING, "''")
+          .put(Field.Kind.TYPE_ENUM, "''")
+          .build();
+
+  private final String apiTypeName;
+
+  public PhpSampleTypeNameConverter(String apiTypeName) {
+    this.apiTypeName = apiTypeName;
+  }
+
+  @Override
+  public TypeName getServiceTypeName(String apiTypeName) {
+    return new TypeName(apiTypeName);
+  }
+
+  @Override
+  public TypeName getRequestTypeName(String apiTypeName, TypeInfo typeInfo) {
+    // N/A
+    return null;
+  }
+
+  @Override
+  public TypeName getTypeName(TypeInfo typeInfo) {
+    // This method is only ever called for the request body type, which should
+    // always be a message.
+    if (typeInfo.isMessage()) {
+      return new TypeName(apiTypeName + "_" + typeInfo.message().typeName());
+    }
+    return getTypeNameForElementType(typeInfo);
+  }
+
+  @Override
+  public TypeName getTypeNameForElementType(TypeInfo typeInfo) {
+    throw new IllegalArgumentException("unknown type kind: " + typeInfo.kind());
+  }
+
+  @Override
+  public TypedValue getZeroValue(TypeInfo typeInfo) {
+    // Don't call getTypeName; we don't need to import these.
+    if (typeInfo.isMap()) {
+      return TypedValue.create(new TypeName("Array"), "[]");
+    }
+    if (typeInfo.isArray()) {
+      return TypedValue.create(new TypeName("Array"), "[]");
+    }
+    if (PRIMITIVE_ZERO_VALUE.containsKey(typeInfo.kind())) {
+      return TypedValue.create(
+          new TypeName(PRIMITIVE_TYPE_MAP.get(typeInfo.kind())),
+          PRIMITIVE_ZERO_VALUE.get(typeInfo.kind()));
+    }
+    if (typeInfo.isMessage()) {
+      return TypedValue.create(new TypeName("Object"), "new stdClass()");
+    }
+    throw new IllegalArgumentException("unknown type kind: " + typeInfo.kind());
+  }
+}
diff --git a/src/main/java/com/google/api/codegen/discovery/viewmodel/SampleView.java b/src/main/java/com/google/api/codegen/discovery/viewmodel/SampleView.java
index f3803381e6..4223c871be 100644
--- a/src/main/java/com/google/api/codegen/discovery/viewmodel/SampleView.java
+++ b/src/main/java/com/google/api/codegen/discovery/viewmodel/SampleView.java
@@ -118,6 +118,10 @@ public String resourceRoot() {
   @Nullable
   public abstract String contextVarName();
 
+  // PHP specific section...
+  @Nullable
+  public abstract String optParamsVarName();
+
   // Ruby specific section...
   @Nullable
   public abstract String serviceRequirePath();
@@ -204,6 +208,8 @@ public abstract static class Builder {
 
     public abstract Builder contextVarName(String val);
 
+    public abstract Builder optParamsVarName(String val);
+
     public abstract Builder serviceRequirePath(String val);
 
     public abstract Builder serviceTypeNamespace(String val);
diff --git a/src/main/java/com/google/api/codegen/util/php/PhpTypeTable.java b/src/main/java/com/google/api/codegen/util/php/PhpTypeTable.java
index 4f6b797d7e..c884280581 100644
--- a/src/main/java/com/google/api/codegen/util/php/PhpTypeTable.java
+++ b/src/main/java/com/google/api/codegen/util/php/PhpTypeTable.java
@@ -19,6 +19,7 @@
 import com.google.api.codegen.util.TypeAlias;
 import com.google.api.codegen.util.TypeName;
 import com.google.api.codegen.util.TypeTable;
+import com.google.common.collect.ImmutableSet;
 import java.util.Map;
 import java.util.TreeMap;
 
@@ -100,4 +101,79 @@ public String getAndSaveNicknameForInnerType(
       String containerFullName, String innerTypeShortName) {
     return dynamicTypeTable.getAndSaveNicknameForInnerType(containerFullName, innerTypeShortName);
   }
+
+  /**
+   * : A set of PHP keywords and built-ins. Keywords:
+   * http://docs.ruby-lang.org/en/2.3.0/keywords_rdoc.html
+   */
+  public static final ImmutableSet<String> RESERVED_IDENTIFIER_SET =
+      ImmutableSet.<String>builder()
+          .add(
+              "abstract",
+              "and",
+              "array",
+              "as",
+              "break",
+              "callable",
+              "case",
+              "catch",
+              "class",
+              "clone",
+              "const",
+              "continue",
+              "declare",
+              "default",
+              "die",
+              "do",
+              "echo",
+              "else",
+              "elseif",
+              "empty",
+              "enddeclare",
+              "endfor",
+              "endforeach",
+              "endif",
+              "endswitch",
+              "endwhile",
+              "eval",
+              "exit",
+              "extends",
+              "final",
+              "finally",
+              "for",
+              "foreach",
+              "function",
+              "global",
+              "goto",
+              "if",
+              "implements",
+              "include",
+              "include_once",
+              "instanceof",
+              "insteadof",
+              "interface",
+              "isset",
+              "list",
+              "namespace",
+              "new",
+              "or",
+              "print",
+              "private",
+              "protected",
+              "public",
+              "require",
+              "require_once",
+              "return",
+              "static",
+              "switch",
+              "throw",
+              "trait",
+              "try",
+              "unset",
+              "use",
+              "var",
+              "while",
+              "xor",
+              "yield")
+          .build();
 }
diff --git a/src/main/java/com/google/api/codegen/util/ruby/RubyTypeTable.java b/src/main/java/com/google/api/codegen/util/ruby/RubyTypeTable.java
index 2a0f8a6227..75e6e799a2 100644
--- a/src/main/java/com/google/api/codegen/util/ruby/RubyTypeTable.java
+++ b/src/main/java/com/google/api/codegen/util/ruby/RubyTypeTable.java
@@ -91,7 +91,7 @@ public String getAndSaveNicknameForInnerType(
   }
 
   /**
-   * : A set of ruby keywords and built-ins. keywords:
+   * : A set of Ruby keywords and built-ins. Keywords:
    * http://docs.ruby-lang.org/en/2.3.0/keywords_rdoc.html
    */
   public static final ImmutableSet<String> RESERVED_IDENTIFIER_SET =
diff --git a/src/main/resources/com/google/api/codegen/php/sample.snip b/src/main/resources/com/google/api/codegen/php/sample.snip
new file mode 100644
index 0000000000..df8bd5c172
--- /dev/null
+++ b/src/main/resources/com/google/api/codegen/php/sample.snip
@@ -0,0 +1,146 @@
+@snippet generate(class)
+  <?php
+  /* 
+   * BEFORE RUNNING:
+   * ---------------
+   * 1. If not already done, enable the {@class.apiTitle}
+   *    and check the quota for your project at
+   *    https://console.developers.google.com/apis/api/{@class.apiName}
+   @switch class.auth.type
+   @case "APPLICATION_DEFAULT_CREDENTIALS"
+     * 2. This sample uses Application Default Credentials for authentication.
+     *    If not already done, install the gcloud CLI from
+     *    https://cloud.google.com/sdk and run
+     *    `gcloud beta auth application-default login`
+     *    For more information, see:
+     *    https://developers.google.com/identity/protocols/application-default-credentials
+     * 3. Install the PHP client library with Composer. Check installation
+     *    instructions at https://github.com/google/google-api-php-client.
+   @default
+     * 2. Install the PHP client library with Composer. Check installation
+     *    instructions at https://github.com/google/google-api-php-client.
+   @end
+   */
+
+  // Autoload Composer.
+  require_once __DIR__ . '/vendor/autoload.php';
+
+  @switch class.auth.type
+  @case "APPLICATION_DEFAULT_CREDENTIALS"
+    ${@class.clientVarName} = new Google_Client();
+    ${@class.clientVarName}->setApplicationName('{@class.appName}');
+    ${@class.clientVarName}->useApplicationDefaultCredentials();
+    ${@class.clientVarName}->addScope('https://www.googleapis.com/auth/cloud-platform');
+  @case "OAUTH_3L"
+    ${@class.clientVarName} = getClient();
+  @default
+    ${@class.clientVarName} = new Google_Client();
+    ${@class.clientVarName}->setApplicationName('{@class.appName}');
+    ${@class.clientVarName}->setDeveloperKey('');  // TODO: Update placeholder with desired API key.
+  @end
+
+  ${@class.serviceVarName} = new {@class.serviceTypeName}(${@class.clientVarName});
+
+  @join field : class.fields if class.fields
+    @if field.description
+      @join line : util.getDocLines(field.description, 100)
+        // {@line}
+      @end
+
+
+    @end
+    ${@field.name} = {@field.defaultValue};  // TODO: Update placeholder value.
+    @if field.example
+      // {@field.example}
+    @end
+
+  @end
+  @if class.hasRequestBody
+    @if class.methodVerb == "PATCH"
+      // TODO: Assign values to desired properties of `{@class.requestBodyVarName}`. Only assigned
+      // properties will be changed:
+    @else
+      // TODO: Assign values to desired properties of `{@class.requestBodyVarName}`:
+    @end
+
+    ${@class.requestBodyVarName} = new {@class.requestBodyTypeName}();
+
+  @end
+  @if class.hasMediaUpload
+    // TODO: Add desired media content for upload. For more information, see:
+    // https://developers.google.com/api-client-library/php/guide/media_upload
+
+  @end
+  @if class.optParamsVarName
+    ${@class.optParamsVarName} = [];
+  @end
+  @if class.hasMediaDownload
+
+    // TODO: To download media content, use:
+    //
+    // ${@class.optParamsVarName}['alt'] = 'media';
+
+  @end
+  @if class.isPageStreaming
+    do {
+      ${@class.responseVarName} = ${@class.serviceVarName}->{@callChain(class.methodNameComponents)}({@paramList(class.fieldVarNames)});
+
+      @if class.pageStreaming.isResourceMap
+        foreach (${@class.responseVarName}['{@class.pageStreaming.resourceFieldName}'] as ${@class.pageStreaming.resourceKeyVarName} => ${@class.pageStreaming.resourceValueVarName}) {
+          // TODO: Change code below to process each ({@class.pageStreaming.resourceKeyVarName} => {@class.pageStreaming.resourceValueVarName}) element:
+          echo '<pre>', ${@class.pageStreaming.resourceKeyVarName}, ' => ', var_export(${@class.pageStreaming.resourceValueVarName}, true), '</pre>', "\n";
+        }
+      @else
+        foreach (${@class.responseVarName}['{@class.pageStreaming.resourceFieldName}'] as ${@class.pageStreaming.resourceVarName}) {
+          // TODO: Change code below to process each `{@class.pageStreaming.resourceVarName}` resource:
+          echo '<pre>', var_export(${@class.pageStreaming.resourceVarName}, true), '</pre>', "\n";
+        }
+      @end
+
+      ${@class.optParamsVarName()}['pageToken'] = ${@class.responseVarName}->getNextPageToken();
+    } while (${@class.optParamsVarName}['pageToken']);
+  @else
+    @if class.hasResponse
+      ${@class.responseVarName} = ${@class.serviceVarName}->{@callChain(class.methodNameComponents)}({@paramList(class.fieldVarNames)});
+
+      // TODO: Change code below to process the `{@class.responseVarName}` object:
+      echo '<pre>', var_export(${@class.responseVarName}, true), '</pre>', "\n";
+    @else
+      ${@class.serviceVarName}->{@callChain(class.methodNameComponents)}({@paramList(class.fieldVarNames)});
+    @end
+  @end
+  @if class.auth.type == "OAUTH_3L"
+
+    {@getClientFunc(class)}
+  @end
+  ?>
+@end
+
+@private getClientFunc(class)
+  function getClient() {
+    // TODO: Change placeholder below to generate authentication credentials. See:
+    // {@class.auth.instructionsUrl}
+    //
+    @if class.auth.isScopesSingular
+      // Authorize using the following scope:
+    @else
+      // Authorize using one of the following scopes:
+    @end
+    @join scope : class.auth.scopes
+      //   {@scope}
+    @end
+    return null;
+  }
+@end
+
+@private callChain(methodNameComponents)
+  @join resource : methodNameComponents on "->"
+    {@resource}
+  @end
+@end
+
+@private paramList(fieldVarNames)
+  @join fieldVarName : fieldVarNames on ", "
+    ${@fieldVarName}
+  @end
+@end
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/java/java_storagetransfer.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/java/java_storagetransfer.v1.json.baseline
index de3be61cd1..c30e42ccb6 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/java/java_storagetransfer.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/java/java_storagetransfer.v1.json.baseline
@@ -27,12 +27,8 @@ import java.util.Arrays;
 
 public class StoragetransferExample {
   public static void main(String args[]) throws IOException, GeneralSecurityException {
-    // The ID of the Google Developers Console project that the Google service account is associated with.
-    // Required.
-    String projectId = "";  // TODO: Update placeholder value.
-
     Storagetransfer storagetransferService = createStoragetransferService();
-    Storagetransfer.GoogleServiceAccounts.Get request = storagetransferService.googleServiceAccounts().get(projectId);
+    Storagetransfer.V1.GetGoogleServiceAccount request = storagetransferService.v1().getGoogleServiceAccount();
 
     GoogleServiceAccount response = request.execute();
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_adexchangebuyer.v1.4.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_adexchangebuyer.v1.4.json.baseline
index 0698158d4b..6c780d2464 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_adexchangebuyer.v1.4.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_adexchangebuyer.v1.4.json.baseline
@@ -17,12 +17,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The account id
-$id = 0;
-
+$id = 0;  // TODO: Update placeholder value.
 
 $response = $service->accounts->get($id);
 
@@ -30,10 +26,10 @@ $response = $service->accounts->get($id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -56,17 +52,16 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
 $response = $service->accounts->listAccounts();
 
 // TODO: Change code below to process the `response` object:
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAccounts` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -89,16 +84,12 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `patch` method:
-
 // The account id
-$id = 0;
-
+$id = 0;  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_AdExchangeBuyer_Account();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->accounts->patch($id, $requestBody);
 
@@ -106,10 +97,10 @@ $response = $service->accounts->patch($id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -132,16 +123,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // The account id
-$id = 0;
-
+$id = 0;  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_Account();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->accounts->update($id, $requestBody);
 
@@ -149,10 +135,10 @@ $response = $service->accounts->update($id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -175,12 +161,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The account id.
-$accountId = 0;
-
+$accountId = 0;  // TODO: Update placeholder value.
 
 $response = $service->billingInfo->get($accountId);
 
@@ -188,10 +170,10 @@ $response = $service->billingInfo->get($accountId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -214,17 +196,16 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
 $response = $service->billingInfo->listBillingInfo();
 
 // TODO: Change code below to process the `response` object:
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listBillingInfo` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -247,15 +228,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The account id to get the budget information for.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The billing id to get the budget information for.
-$billingId = '0';
-
+$billingId = '0';  // TODO: Update placeholder value.
 
 $response = $service->budget->get($accountId, $billingId);
 
@@ -263,10 +240,10 @@ $response = $service->budget->get($accountId, $billingId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -289,19 +266,15 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // The account id associated with the budget being updated.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The billing id associated with the budget being updated.
-$billingId = '0';
-
+$billingId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_AdExchangeBuyer_Budget();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->budget->patch($accountId, $billingId, $requestBody);
 
@@ -309,10 +282,10 @@ $response = $service->budget->patch($accountId, $billingId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -335,19 +308,14 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The account id associated with the budget being updated.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The billing id associated with the budget being updated.
-$billingId = '0';
-
+$billingId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_Budget();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->budget->update($accountId, $billingId, $requestBody);
 
@@ -355,10 +323,10 @@ $response = $service->budget->update($accountId, $billingId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -381,26 +349,22 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addDeal` method:
-
 // The id for the account that will serve this creative.
-$accountId = 0;
+$accountId = 0;  // TODO: Update placeholder value.
 
 // The buyer-specific id for this creative.
-$buyerCreativeId = '{MY-BUYER-CREATIVE-ID}';
+$buyerCreativeId = '';  // TODO: Update placeholder value.
 
 // The id of the deal id to associate with this creative.
-$dealId = '0';
-
+$dealId = '0';  // TODO: Update placeholder value.
 
 $service->creatives->addDeal($accountId, $buyerCreativeId, $dealId);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `addDeal` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -423,15 +387,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The id for the account that will serve this creative.
-$accountId = 0;
+$accountId = 0;  // TODO: Update placeholder value.
 
 // The buyer-specific id for this creative.
-$buyerCreativeId = '{MY-BUYER-CREATIVE-ID}';
-
+$buyerCreativeId = '';  // TODO: Update placeholder value.
 
 $response = $service->creatives->get($accountId, $buyerCreativeId);
 
@@ -439,10 +399,10 @@ $response = $service->creatives->get($accountId, $buyerCreativeId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -465,10 +425,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_Creative();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creatives->insert($requestBody);
 
@@ -476,10 +434,10 @@ $response = $service->creatives->insert($requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -502,8 +460,7 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->creatives->listCreatives($optParams);
 
@@ -516,10 +473,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCreatives` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -542,15 +499,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listDeals` method:
-
 // The id for the account that will serve this creative.
-$accountId = 0;
+$accountId = 0;  // TODO: Update placeholder value.
 
 // The buyer-specific id for this creative.
-$buyerCreativeId = '{MY-BUYER-CREATIVE-ID}';
-
+$buyerCreativeId = '';  // TODO: Update placeholder value.
 
 $response = $service->creatives->listDeals($accountId, $buyerCreativeId);
 
@@ -558,10 +511,10 @@ $response = $service->creatives->listDeals($accountId, $buyerCreativeId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listDeals` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -584,26 +537,22 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `removeDeal` method:
-
 // The id for the account that will serve this creative.
-$accountId = 0;
+$accountId = 0;  // TODO: Update placeholder value.
 
 // The buyer-specific id for this creative.
-$buyerCreativeId = '{MY-BUYER-CREATIVE-ID}';
+$buyerCreativeId = '';  // TODO: Update placeholder value.
 
 // The id of the deal id to disassociate with this creative.
-$dealId = '0';
-
+$dealId = '0';  // TODO: Update placeholder value.
 
 $service->creatives->removeDeal($accountId, $buyerCreativeId, $dealId);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `removeDeal` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -626,16 +575,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // The proposalId to delete deals from.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_DeleteOrderDealsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->marketplacedeals->delete($proposalId, $requestBody);
 
@@ -643,10 +587,10 @@ $response = $service->marketplacedeals->delete($proposalId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -669,16 +613,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // proposalId for which deals need to be added.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_AddOrderDealsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->marketplacedeals->insert($proposalId, $requestBody);
 
@@ -686,10 +625,10 @@ $response = $service->marketplacedeals->insert($proposalId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -712,13 +651,9 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listMarketplacedeals` method:
-
 // The proposalId to get deals for. To search across all proposals specify order_id = '-' as part of
 // the URL.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
 $response = $service->marketplacedeals->listMarketplacedeals($proposalId);
 
@@ -726,10 +661,10 @@ $response = $service->marketplacedeals->listMarketplacedeals($proposalId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listMarketplacedeals` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -752,16 +687,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // The proposalId to edit deals on.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_EditAllOrderDealsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->marketplacedeals->update($proposalId, $requestBody);
 
@@ -769,10 +699,10 @@ $response = $service->marketplacedeals->update($proposalId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -795,16 +725,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // The proposalId to add notes for.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_AddOrderNotesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->marketplacenotes->insert($proposalId, $requestBody);
 
@@ -812,10 +737,10 @@ $response = $service->marketplacenotes->insert($proposalId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -838,13 +763,9 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listMarketplacenotes` method:
-
 // The proposalId to get notes for. To search across all proposals specify order_id = '-' as part of
 // the URL.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
 $response = $service->marketplacenotes->listMarketplacenotes($proposalId);
 
@@ -852,10 +773,10 @@ $response = $service->marketplacenotes->listMarketplacenotes($proposalId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listMarketplacenotes` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -878,24 +799,19 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `updateproposal` method:
-
 // The private auction id to be updated.
-$privateAuctionId = '{MY-PRIVATE-AUCTION-ID}';
-
+$privateAuctionId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_UpdatePrivateAuctionProposalRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->marketplaceprivateauction->updateproposal($privateAuctionId, $requestBody);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `updateproposal` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -918,18 +834,14 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listPerformanceReport` method:
-
 // The account id to get the reports.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The end time of the report in ISO 8601 timestamp format using UTC.
-$endDateTime = '{MY-END-DATE-TIME}';
+$endDateTime = '';  // TODO: Update placeholder value.
 
 // The start time of the report in ISO 8601 timestamp format using UTC.
-$startDateTime = '{MY-START-DATE-TIME}';
-
+$startDateTime = '';  // TODO: Update placeholder value.
 
 $response = $service->performanceReport->listPerformanceReport($accountId, $endDateTime, $startDateTime);
 
@@ -937,10 +849,10 @@ $response = $service->performanceReport->listPerformanceReport($accountId, $endD
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPerformanceReport` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -963,23 +875,19 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The account id to delete the pretargeting config for.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The specific id of the configuration to delete.
-$configId = '0';
-
+$configId = '0';  // TODO: Update placeholder value.
 
 $service->pretargetingConfig->delete($accountId, $configId);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1002,15 +910,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The account id to get the pretargeting config for.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The specific id of the configuration to retrieve.
-$configId = '0';
-
+$configId = '0';  // TODO: Update placeholder value.
 
 $response = $service->pretargetingConfig->get($accountId, $configId);
 
@@ -1018,10 +922,10 @@ $response = $service->pretargetingConfig->get($accountId, $configId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1044,16 +948,11 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // The account id to insert the pretargeting config for.
-$accountId = '0';
-
+$accountId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_PretargetingConfig();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->pretargetingConfig->insert($accountId, $requestBody);
 
@@ -1061,10 +960,10 @@ $response = $service->pretargetingConfig->insert($accountId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1087,12 +986,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPretargetingConfig` method:
-
 // The account id to get the pretargeting configs for.
-$accountId = '0';
-
+$accountId = '0';  // TODO: Update placeholder value.
 
 $response = $service->pretargetingConfig->listPretargetingConfig($accountId);
 
@@ -1100,10 +995,10 @@ $response = $service->pretargetingConfig->listPretargetingConfig($accountId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPretargetingConfig` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1126,19 +1021,15 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // The account id to update the pretargeting config for.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The specific id of the configuration to update.
-$configId = '0';
-
+$configId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_AdExchangeBuyer_PretargetingConfig();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->pretargetingConfig->patch($accountId, $configId, $requestBody);
 
@@ -1146,10 +1037,10 @@ $response = $service->pretargetingConfig->patch($accountId, $configId, $requestB
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1172,19 +1063,14 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The account id to update the pretargeting config for.
-$accountId = '0';
+$accountId = '0';  // TODO: Update placeholder value.
 
 // The specific id of the configuration to update.
-$configId = '0';
-
+$configId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_PretargetingConfig();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->pretargetingConfig->update($accountId, $configId, $requestBody);
 
@@ -1192,10 +1078,10 @@ $response = $service->pretargetingConfig->update($accountId, $configId, $request
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1218,12 +1104,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The id for the product to get the head revision for.
-$productId = '{MY-PRODUCT-ID}';
-
+$productId = '';  // TODO: Update placeholder value.
 
 $response = $service->products->get($productId);
 
@@ -1231,10 +1113,10 @@ $response = $service->products->get($productId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1257,17 +1139,16 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
 $response = $service->products->search();
 
 // TODO: Change code below to process the `response` object:
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `search` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1290,12 +1171,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // Id of the proposal to retrieve.
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
 $response = $service->proposals->get($proposalId);
 
@@ -1303,10 +1180,10 @@ $response = $service->proposals->get($proposalId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1329,10 +1206,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_CreateOrdersRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->proposals->insert($requestBody);
 
@@ -1340,10 +1215,10 @@ $response = $service->proposals->insert($requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1366,25 +1241,21 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // The proposal id to update.
-$proposalId = '{MY-PROPOSAL-ID}';
-
-// The last known revision number to update. If the head revision in the marketplace database has since
-// changed, an error will be thrown. The caller should then fetch the latest proposal at head revision
-// and retry the update at that revision.
-$revisionNumber = '0';
+$proposalId = '';  // TODO: Update placeholder value.
 
-// The proposed action to take on the proposal. This field is required and it must be set when updating
-// a proposal.
-$updateAction = '{MY-UPDATE-ACTION}';
+// The last known revision number to update. If the head revision in the marketplace database has
+// since changed, an error will be thrown. The caller should then fetch the latest proposal at head
+// revision and retry the update at that revision.
+$revisionNumber = '0';  // TODO: Update placeholder value.
 
+// The proposed action to take on the proposal. This field is required and it must be set when
+// updating a proposal.
+$updateAction = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_AdExchangeBuyer_Proposal();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->proposals->patch($proposalId, $revisionNumber, $updateAction, $requestBody);
 
@@ -1392,10 +1263,10 @@ $response = $service->proposals->patch($proposalId, $revisionNumber, $updateActi
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1418,17 +1289,16 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
 $response = $service->proposals->search();
 
 // TODO: Change code below to process the `response` object:
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `search` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1451,20 +1321,16 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `setupcomplete` method:
-
 // The proposal id for which the setup is complete
-$proposalId = '{MY-PROPOSAL-ID}';
-
+$proposalId = '';  // TODO: Update placeholder value.
 
 $service->proposals->setupcomplete($proposalId);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `setupcomplete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1487,25 +1353,20 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The proposal id to update.
-$proposalId = '{MY-PROPOSAL-ID}';
+$proposalId = '';  // TODO: Update placeholder value.
 
-// The last known revision number to update. If the head revision in the marketplace database has since
-// changed, an error will be thrown. The caller should then fetch the latest proposal at head revision
-// and retry the update at that revision.
-$revisionNumber = '0';
-
-// The proposed action to take on the proposal. This field is required and it must be set when updating
-// a proposal.
-$updateAction = '{MY-UPDATE-ACTION}';
+// The last known revision number to update. If the head revision in the marketplace database has
+// since changed, an error will be thrown. The caller should then fetch the latest proposal at head
+// revision and retry the update at that revision.
+$revisionNumber = '0';  // TODO: Update placeholder value.
 
+// The proposed action to take on the proposal. This field is required and it must be set when
+// updating a proposal.
+$updateAction = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_AdExchangeBuyer_Proposal();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->proposals->update($proposalId, $revisionNumber, $updateAction, $requestBody);
 
@@ -1513,10 +1374,10 @@ $response = $service->proposals->update($proposalId, $revisionNumber, $updateAct
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
@@ -1539,12 +1400,8 @@ $client = getClient();
 
 $service = new Google_Service_AdExchangeBuyer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPubprofiles` method:
-
 // The accountId of the publisher to get profiles for.
-$accountId = 0;
-
+$accountId = 0;  // TODO: Update placeholder value.
 
 $response = $service->pubprofiles->listPubprofiles($accountId);
 
@@ -1552,10 +1409,10 @@ $response = $service->pubprofiles->listPubprofiles($accountId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPubprofiles` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/adexchange.buyer
   return null;
 }
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_appengine.v1beta5.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_appengine.v1beta5.json.baseline
index 831d38c45e..ce32ecd28d 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_appengine.v1beta5.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_appengine.v1beta5.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,10 +26,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Appengine_Application();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->apps->create($requestBody);
 
@@ -46,8 +43,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -55,9 +54,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -65,12 +61,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // Part of `name`. Name of the application to get. Example: `apps/myapp`.
-$appsId = '{MY-APPS-ID}';
-
+$appsId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps->get($appsId);
 
@@ -86,8 +78,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -95,9 +89,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -105,15 +96,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Part of `name`. Resource name for the location.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$locationsId = '{MY-LOCATIONS-ID}';
-
+$locationsId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_locations->get($appsId, $locationsId);
 
@@ -129,8 +116,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -138,9 +127,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -148,14 +134,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAppsLocations` method:
-
 // Part of `name`. The resource that owns the locations collection, if applicable.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->apps_locations->listAppsLocations($appsId, $optParams);
 
@@ -176,8 +158,10 @@ do {
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -185,9 +169,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -195,15 +176,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Part of `name`. The name of the operation resource.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$operationsId = '{MY-OPERATIONS-ID}';
-
+$operationsId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_operations->get($appsId, $operationsId);
 
@@ -219,8 +196,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -228,9 +207,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -238,14 +214,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAppsOperations` method:
-
 // Part of `name`. The name of the operation collection.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->apps_operations->listAppsOperations($appsId, $optParams);
 
@@ -266,8 +238,10 @@ do {
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -275,9 +249,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -285,16 +256,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `patch` method:
-
 // Part of `name`. Name of the application to update. Example: `apps/myapp`.
-$appsId = '{MY-APPS-ID}';
-
+$appsId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Appengine_Application();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->apps->patch($appsId, $requestBody);
 
@@ -310,8 +277,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -319,9 +288,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -329,15 +295,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp/services/default`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
-
+$servicesId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_services->delete($appsId, $servicesId);
 
@@ -353,8 +315,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -362,9 +326,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -372,15 +333,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp/services/default`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
-
+$servicesId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_services->get($appsId, $servicesId);
 
@@ -396,8 +353,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -405,9 +364,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -415,20 +371,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAppsServices` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp`.
-$appsId = '{MY-APPS-ID}';
-
+$appsId = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->apps_services->listAppsServices($appsId, $optParams);
 
-  foreach ($response['services'] as $service) {
-    // TODO: Change code below to process each `service` resource:
-    echo '<pre>', var_export($service, true), '</pre>', "\n";
+  foreach ($response['services'] as $service2) {
+    // TODO: Change code below to process each `service2` resource:
+    echo '<pre>', var_export($service2, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -443,8 +395,10 @@ do {
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -452,9 +406,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -462,19 +413,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Part of `name`. Name of the resource to update. Example: `apps/myapp/services/default`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
-
+$servicesId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Appengine_Service();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->apps_services->patch($appsId, $servicesId, $requestBody);
 
@@ -490,8 +437,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -499,9 +448,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -509,19 +455,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `create` method:
-
 // Part of `name`. Name of the resource to update. For example: "apps/myapp/services/default".
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
-
+$servicesId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Appengine_Version();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->apps_services_versions->create($appsId, $servicesId, $requestBody);
 
@@ -537,8 +478,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -546,9 +489,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -556,18 +496,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp/services/default/versions/v1`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
-
+$versionsId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_services_versions->delete($appsId, $servicesId, $versionsId);
 
@@ -583,8 +519,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -592,9 +530,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -602,18 +537,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp/services/default/versions/v1`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
-
+$versionsId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_services_versions->get($appsId, $servicesId, $versionsId);
 
@@ -629,8 +560,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -638,9 +571,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -648,26 +578,21 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `debug` method:
-
 // Part of `name`. Name of the resource requested. Example:
 // `apps/myapp/services/default/versions/v1/instances/instance-1`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
+$versionsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$instancesId = '{MY-INSTANCES-ID}';
-
+$instancesId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Appengine_DebugInstanceRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->apps_services_versions_instances->debug($appsId, $servicesId, $versionsId, $instancesId, $requestBody);
 
@@ -683,8 +608,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -692,9 +619,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -702,22 +626,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Part of `name`. Name of the resource requested. For example:
 // "apps/myapp/services/default/versions/v1/instances/instance-1".
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
+$versionsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$instancesId = '{MY-INSTANCES-ID}';
-
+$instancesId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_services_versions_instances->delete($appsId, $servicesId, $versionsId, $instancesId);
 
@@ -733,8 +653,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -742,9 +664,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -752,22 +671,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Part of `name`. Name of the resource requested. Example:
 // `apps/myapp/services/default/versions/v1/instances/instance-1`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
+$versionsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$instancesId = '{MY-INSTANCES-ID}';
-
+$instancesId = '';  // TODO: Update placeholder value.
 
 $response = $service->apps_services_versions_instances->get($appsId, $servicesId, $versionsId, $instancesId);
 
@@ -783,8 +698,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -792,9 +709,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -802,20 +716,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listAppsServicesVersionsInstances` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp/services/default/versions/v1`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
+$versionsId = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->apps_services_versions_instances->listAppsServicesVersionsInstances($appsId, $servicesId, $versionsId, $optParams);
 
@@ -836,8 +746,10 @@ do {
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -845,9 +757,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -855,17 +764,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listAppsServicesVersions` method:
-
 // Part of `name`. Name of the resource requested. Example: `apps/myapp/services/default`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
-
+$servicesId = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->apps_services_versions->listAppsServicesVersions($appsId, $servicesId, $optParams);
 
@@ -886,8 +791,10 @@ do {
  *    https://console.developers.google.com/apis/api/appengine
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -895,9 +802,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-AppengineSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -905,22 +809,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Appengine($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Part of `name`. Name of the resource to update. Example: `apps/myapp/services/default/versions/1`.
-$appsId = '{MY-APPS-ID}';
+$appsId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$servicesId = '{MY-SERVICES-ID}';
+$servicesId = '';  // TODO: Update placeholder value.
 
 // Part of `name`. See documentation of `appsId`.
-$versionsId = '{MY-VERSIONS-ID}';
-
+$versionsId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Appengine_Version();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->apps_services_versions->patch($appsId, $servicesId, $versionsId, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_bigquery.v2.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_bigquery.v2.json.baseline
index b1d2983b15..cb910bb968 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_bigquery.v2.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_bigquery.v2.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,15 +26,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the dataset being deleted
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of dataset being deleted
-$datasetId = '{MY-DATASET-ID}';
-
+$datasetId = '';  // TODO: Update placeholder value.
 
 $service->datasets->delete($projectId, $datasetId);
 ?>
@@ -48,8 +43,10 @@ $service->datasets->delete($projectId, $datasetId);
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -57,9 +54,6 @@ $service->datasets->delete($projectId, $datasetId);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -67,15 +61,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the requested dataset
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the requested dataset
-$datasetId = '{MY-DATASET-ID}';
-
+$datasetId = '';  // TODO: Update placeholder value.
 
 $response = $service->datasets->get($projectId, $datasetId);
 
@@ -91,8 +81,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -100,9 +92,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -110,16 +99,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID of the new dataset
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_Dataset();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->datasets->insert($projectId, $requestBody);
 
@@ -135,8 +119,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -144,9 +130,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -154,20 +137,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDatasets` method:
-
 // Project ID of the datasets to be listed
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->datasets->listDatasets($projectId, $optParams);
 
-  foreach ($response['datasets'] as $dataset_list._datasets) {
-    // TODO: Change code below to process each `dataset_list._datasets` resource:
-    echo '<pre>', var_export($dataset_list._datasets, true), '</pre>', "\n";
+  foreach ($response['datasets'] as $datasets) {
+    // TODO: Change code below to process each `datasets` resource:
+    echo '<pre>', var_export($datasets, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -182,8 +161,10 @@ do {
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -191,9 +172,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -201,19 +179,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID of the dataset being updated
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the dataset being updated
-$datasetId = '{MY-DATASET-ID}';
-
+$datasetId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Bigquery_Dataset();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->datasets->patch($projectId, $datasetId, $requestBody);
 
@@ -229,8 +203,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -238,9 +214,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -248,19 +221,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID of the dataset being updated
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the dataset being updated
-$datasetId = '{MY-DATASET-ID}';
-
+$datasetId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_Dataset();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->datasets->update($projectId, $datasetId, $requestBody);
 
@@ -276,8 +244,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -285,9 +255,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -295,15 +262,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `cancel` method:
-
 // [Required] Project ID of the job to cancel
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // [Required] Job ID of the job to cancel
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
 $response = $service->jobs->cancel($projectId, $jobId);
 
@@ -319,8 +282,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -328,9 +293,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -338,15 +300,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // [Required] Project ID of the requested job
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // [Required] Job ID of the requested job
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
 $response = $service->jobs->get($projectId, $jobId);
 
@@ -362,8 +320,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -371,9 +331,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -381,15 +338,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getQueryResults` method:
-
 // [Required] Project ID of the query job
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // [Required] Job ID of the query job
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
 $response = $service->jobs->getQueryResults($projectId, $jobId);
 
@@ -405,8 +358,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -414,9 +369,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -424,21 +376,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID of the project that will be billed for the job
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_Job();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 // TODO: Add desired media content for upload. For more information, see:
 // https://developers.google.com/api-client-library/php/guide/media_upload
 
-
 $response = $service->jobs->insert($projectId, $requestBody);
 
 // TODO: Change code below to process the `response` object:
@@ -453,8 +399,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -462,9 +410,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -472,20 +417,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listJobs` method:
-
 // Project ID of the jobs to list
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->jobs->listJobs($projectId, $optParams);
 
-  foreach ($response['jobs'] as $job_list._jobs) {
-    // TODO: Change code below to process each `job_list._jobs` resource:
-    echo '<pre>', var_export($job_list._jobs, true), '</pre>', "\n";
+  foreach ($response['jobs'] as $jobs) {
+    // TODO: Change code below to process each `jobs` resource:
+    echo '<pre>', var_export($jobs, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -500,8 +441,10 @@ do {
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -509,9 +452,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -519,16 +459,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `query` method:
-
 // Project ID of the project billed for the query
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_QueryRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->jobs->query($projectId, $requestBody);
 
@@ -544,8 +479,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -553,9 +490,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -563,14 +497,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects->listProjects($optParams);
 
-  foreach ($response['projects'] as $project_list._projects) {
-    // TODO: Change code below to process each `project_list._projects` resource:
-    echo '<pre>', var_export($project_list._projects, true), '</pre>', "\n";
+  foreach ($response['projects'] as $projects) {
+    // TODO: Change code below to process each `projects` resource:
+    echo '<pre>', var_export($projects, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -585,8 +518,10 @@ do {
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -594,9 +529,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -604,22 +536,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insertAll` method:
-
 // Project ID of the destination table.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the destination table.
-$datasetId = '{MY-DATASET-ID}';
+$datasetId = '';  // TODO: Update placeholder value.
 
 // Table ID of the destination table.
-$tableId = '{MY-TABLE-ID}';
-
+$tableId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_TableDataInsertAllRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->tabledata->insertAll($projectId, $datasetId, $tableId, $requestBody);
 
@@ -635,8 +562,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -644,9 +573,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -654,18 +580,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTabledata` method:
-
 // Project ID of the table to read
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the table to read
-$datasetId = '{MY-DATASET-ID}';
+$datasetId = '';  // TODO: Update placeholder value.
 
 // Table ID of the table to read
-$tableId = '{MY-TABLE-ID}';
-
+$tableId = '';  // TODO: Update placeholder value.
 
 $response = $service->tabledata->listTabledata($projectId, $datasetId, $tableId);
 
@@ -681,8 +603,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -690,9 +614,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -700,18 +621,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the table to delete
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the table to delete
-$datasetId = '{MY-DATASET-ID}';
+$datasetId = '';  // TODO: Update placeholder value.
 
 // Table ID of the table to delete
-$tableId = '{MY-TABLE-ID}';
-
+$tableId = '';  // TODO: Update placeholder value.
 
 $service->tables->delete($projectId, $datasetId, $tableId);
 ?>
@@ -724,8 +641,10 @@ $service->tables->delete($projectId, $datasetId, $tableId);
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -733,9 +652,6 @@ $service->tables->delete($projectId, $datasetId, $tableId);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -743,18 +659,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the requested table
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the requested table
-$datasetId = '{MY-DATASET-ID}';
+$datasetId = '';  // TODO: Update placeholder value.
 
 // Table ID of the requested table
-$tableId = '{MY-TABLE-ID}';
-
+$tableId = '';  // TODO: Update placeholder value.
 
 $response = $service->tables->get($projectId, $datasetId, $tableId);
 
@@ -770,8 +682,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -779,9 +693,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -789,19 +700,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID of the new table
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the new table
-$datasetId = '{MY-DATASET-ID}';
-
+$datasetId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_Table();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->tables->insert($projectId, $datasetId, $requestBody);
 
@@ -817,8 +723,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -826,9 +734,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -836,23 +741,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTables` method:
-
 // Project ID of the tables to list
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the tables to list
-$datasetId = '{MY-DATASET-ID}';
-
+$datasetId = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->tables->listTables($projectId, $datasetId, $optParams);
 
-  foreach ($response['tables'] as $table_list._tables) {
-    // TODO: Change code below to process each `table_list._tables` resource:
-    echo '<pre>', var_export($table_list._tables, true), '</pre>', "\n";
+  foreach ($response['tables'] as $tables) {
+    // TODO: Change code below to process each `tables` resource:
+    echo '<pre>', var_export($tables, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -867,8 +768,10 @@ do {
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -876,9 +779,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -886,22 +786,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID of the table to update
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the table to update
-$datasetId = '{MY-DATASET-ID}';
+$datasetId = '';  // TODO: Update placeholder value.
 
 // Table ID of the table to update
-$tableId = '{MY-TABLE-ID}';
-
+$tableId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Bigquery_Table();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->tables->patch($projectId, $datasetId, $tableId, $requestBody);
 
@@ -917,8 +813,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/bigquery
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -926,9 +824,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-BigquerySample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -936,22 +831,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Bigquery($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID of the table to update
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Dataset ID of the table to update
-$datasetId = '{MY-DATASET-ID}';
+$datasetId = '';  // TODO: Update placeholder value.
 
 // Table ID of the table to update
-$tableId = '{MY-TABLE-ID}';
-
+$tableId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Bigquery_Table();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->tables->update($projectId, $datasetId, $tableId, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudbilling.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudbilling.v1.json.baseline
index 037d3ecac1..8ab5f1538f 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudbilling.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudbilling.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/cloudbilling
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudbillingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,13 +26,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Cloudbilling($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The resource name of the billing account to retrieve. For example,
 // `billingAccounts/012345-567890-ABCDEF`.
-$name = 'billingAccounts/{MY-BILLINGACCOUNT}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'billingAccounts/my-billingAccount'
 
 $response = $service->billingAccounts->get($name);
 
@@ -49,8 +45,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudbilling
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -58,9 +56,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudbillingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -68,14 +63,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Cloudbilling($client);
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->billingAccounts->listBillingAccounts($optParams);
 
-  foreach ($response['billingAccounts'] as $billing_account) {
-    // TODO: Change code below to process each `billing_account` resource:
-    echo '<pre>', var_export($billing_account, true), '</pre>', "\n";
+  foreach ($response['billingAccounts'] as $billingAccount) {
+    // TODO: Change code below to process each `billingAccount` resource:
+    echo '<pre>', var_export($billingAccount, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -90,8 +84,10 @@ do {
  *    https://console.developers.google.com/apis/api/cloudbilling
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -99,9 +95,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudbillingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -109,21 +102,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Cloudbilling($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listBillingAccountsProjects` method:
-
 // The resource name of the billing account associated with the projects that you want to list. For
 // example, `billingAccounts/012345-567890-ABCDEF`.
-$name = 'billingAccounts/{MY-BILLINGACCOUNT}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'billingAccounts/my-billingAccount'
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->billingAccounts_projects->listBillingAccountsProjects($name, $optParams);
 
-  foreach ($response['projectBillingInfo'] as $project_billing_info) {
-    // TODO: Change code below to process each `project_billing_info` resource:
-    echo '<pre>', var_export($project_billing_info, true), '</pre>', "\n";
+  foreach ($response['projectBillingInfo'] as $projectBillingInfo) {
+    // TODO: Change code below to process each `projectBillingInfo` resource:
+    echo '<pre>', var_export($projectBillingInfo, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -138,8 +128,10 @@ do {
  *    https://console.developers.google.com/apis/api/cloudbilling
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -147,9 +139,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudbillingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -157,13 +146,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Cloudbilling($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `getBillingInfo` method:
-
 // The resource name of the project for which billing information is retrieved. For example,
 // `projects/tokyo-rain-123`.
-$name = 'projects/{MY-PROJECT}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
 $response = $service->projects->getBillingInfo($name);
 
@@ -179,8 +165,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudbilling
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -188,9 +176,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudbillingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -198,17 +183,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Cloudbilling($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `updateBillingInfo` method:
-
 // The resource name of the project associated with the billing information that you want to update.
 // For example, `projects/tokyo-rain-123`.
-$name = 'projects/{MY-PROJECT}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Cloudbilling_ProjectBillingInfo();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->updateBillingInfo($name, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouddebugger.v2.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouddebugger.v2.json.baseline
index 229a3c872e..399b692938 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouddebugger.v2.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouddebugger.v2.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,12 +26,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listControllerDebuggeesBreakpoints` method:
-
 // Identifies the debuggee.
-$debuggeeId = '{MY-DEBUGGEE-ID}';
-
+$debuggeeId = '';  // TODO: Update placeholder value.
 
 $response = $service->controller_debuggees_breakpoints->listControllerDebuggeesBreakpoints($debuggeeId);
 
@@ -48,8 +43,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -57,9 +54,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -67,19 +61,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Identifies the debuggee being debugged.
-$debuggeeId = '{MY-DEBUGGEE-ID}';
+$debuggeeId = '';  // TODO: Update placeholder value.
 
 // Breakpoint identifier, unique in the scope of the debuggee.
-$id = '{MY-ID}';
-
+$id = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudDebugger_UpdateActiveBreakpointRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->controller_debuggees_breakpoints->update($debuggeeId, $id, $requestBody);
 
@@ -95,8 +84,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -104,9 +95,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -114,10 +102,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudDebugger_RegisterDebuggeeRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->controller_debuggees->register($requestBody);
 
@@ -133,8 +119,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -142,9 +130,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -152,15 +137,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // ID of the debuggee whose breakpoint to delete.
-$debuggeeId = '{MY-DEBUGGEE-ID}';
+$debuggeeId = '';  // TODO: Update placeholder value.
 
 // ID of the breakpoint to delete.
-$breakpointId = '{MY-BREAKPOINT-ID}';
-
+$breakpointId = '';  // TODO: Update placeholder value.
 
 $service->debugger_debuggees_breakpoints->delete($debuggeeId, $breakpointId);
 ?>
@@ -173,8 +154,10 @@ $service->debugger_debuggees_breakpoints->delete($debuggeeId, $breakpointId);
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -182,9 +165,6 @@ $service->debugger_debuggees_breakpoints->delete($debuggeeId, $breakpointId);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -192,15 +172,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // ID of the debuggee whose breakpoint to get.
-$debuggeeId = '{MY-DEBUGGEE-ID}';
+$debuggeeId = '';  // TODO: Update placeholder value.
 
 // ID of the breakpoint to get.
-$breakpointId = '{MY-BREAKPOINT-ID}';
-
+$breakpointId = '';  // TODO: Update placeholder value.
 
 $response = $service->debugger_debuggees_breakpoints->get($debuggeeId, $breakpointId);
 
@@ -216,8 +192,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -225,9 +203,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -235,12 +210,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDebuggerDebuggeesBreakpoints` method:
-
 // ID of the debuggee whose breakpoints to list.
-$debuggeeId = '{MY-DEBUGGEE-ID}';
-
+$debuggeeId = '';  // TODO: Update placeholder value.
 
 $response = $service->debugger_debuggees_breakpoints->listDebuggerDebuggeesBreakpoints($debuggeeId);
 
@@ -256,8 +227,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -265,9 +238,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -275,16 +245,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `set` method:
-
 // ID of the debuggee where the breakpoint is to be set.
-$debuggeeId = '{MY-DEBUGGEE-ID}';
-
+$debuggeeId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudDebugger_Breakpoint();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->debugger_debuggees_breakpoints->set($debuggeeId, $requestBody);
 
@@ -300,8 +265,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouddebugger
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -309,9 +276,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudDebuggerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -319,7 +283,6 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudDebugger($client);
 
-
 $response = $service->debugger_debuggees->listDebuggerDebuggees();
 
 // TODO: Change code below to process the `response` object:
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudmonitoring.v2beta2.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudmonitoring.v2beta2.json.baseline
index 01ab22b595..7e12b93cb2 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudmonitoring.v2beta2.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudmonitoring.v2beta2.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/cloudmonitoring
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudMonitoringSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,16 +26,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudMonitoring($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // The project id. The value can be the numeric project ID or string-based project name.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudMonitoring_MetricDescriptor();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->metricDescriptors->create($project, $requestBody);
 
@@ -52,8 +46,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudmonitoring
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -61,9 +57,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudMonitoringSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -71,15 +64,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudMonitoring($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The project ID to which the metric belongs.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the metric.
-$metric = '{MY-METRIC}';
-
+$metric = '';  // TODO: Update placeholder value.
 
 $response = $service->metricDescriptors->delete($project, $metric);
 
@@ -95,8 +84,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudmonitoring
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -104,9 +95,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudMonitoringSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -114,24 +102,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudMonitoring($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listMetricDescriptors` method:
-
 // The project id. The value can be the numeric project ID or string-based project name.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudMonitoring_ListMetricDescriptorsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->metricDescriptors->listMetricDescriptors($project, $requestBody, $optParams);
 
-  foreach ($response['metrics'] as $metric_descriptor) {
-    // TODO: Change code below to process each `metric_descriptor` resource:
-    echo '<pre>', var_export($metric_descriptor, true), '</pre>', "\n";
+  foreach ($response['metrics'] as $metricDescriptor) {
+    // TODO: Change code below to process each `metricDescriptor` resource:
+    echo '<pre>', var_export($metricDescriptor, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -146,8 +129,10 @@ do {
  *    https://console.developers.google.com/apis/api/cloudmonitoring
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -155,9 +140,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudMonitoringSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -165,26 +147,21 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudMonitoring($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTimeseries` method:
-
 // The project ID to which this time series belongs. The value can be the numeric project ID or
 // string-based project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Metric names are protocol-free URLs as listed in the Supported Metrics page. For example,
 // compute.googleapis.com/instance/disk/read_ops_count.
-$metric = '{MY-METRIC}';
+$metric = '';  // TODO: Update placeholder value.
 
 // End of the time interval (inclusive), which is expressed as an RFC 3339 timestamp.
-$youngest = '{MY-YOUNGEST}';
-
+$youngest = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudMonitoring_ListTimeseriesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->timeseries->listTimeseries($project, $metric, $youngest, $requestBody, $optParams);
 
@@ -205,8 +182,10 @@ do {
  *    https://console.developers.google.com/apis/api/cloudmonitoring
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -214,9 +193,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudMonitoringSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -224,16 +200,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudMonitoring($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `write` method:
-
 // The project ID. The value can be the numeric project ID or string-based project name.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudMonitoring_WriteTimeseriesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->timeseries->write($project, $requestBody);
 
@@ -249,8 +220,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudmonitoring
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -258,9 +231,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudMonitoringSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -268,32 +238,27 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudMonitoring($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTimeseriesDescriptors` method:
-
 // The project ID to which this time series belongs. The value can be the numeric project ID or
 // string-based project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Metric names are protocol-free URLs as listed in the Supported Metrics page. For example,
 // compute.googleapis.com/instance/disk/read_ops_count.
-$metric = '{MY-METRIC}';
+$metric = '';  // TODO: Update placeholder value.
 
 // End of the time interval (inclusive), which is expressed as an RFC 3339 timestamp.
-$youngest = '{MY-YOUNGEST}';
-
+$youngest = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudMonitoring_ListTimeseriesDescriptorsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->timeseriesDescriptors->listTimeseriesDescriptors($project, $metric, $youngest, $requestBody, $optParams);
 
-  foreach ($response['timeseries'] as $timeseries_descriptor) {
-    // TODO: Change code below to process each `timeseries_descriptor` resource:
-    echo '<pre>', var_export($timeseries_descriptor, true), '</pre>', "\n";
+  foreach ($response['timeseries'] as $timeseriesDescriptor) {
+    // TODO: Change code below to process each `timeseriesDescriptor` resource:
+    echo '<pre>', var_export($timeseriesDescriptor, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudresourcemanager.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudresourcemanager.v1.json.baseline
index e931a4e8da..3083b81419 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudresourcemanager.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudresourcemanager.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,12 +26,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The name of the operation resource.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
 $response = $service->operations->get($name);
 
@@ -48,8 +43,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -57,9 +54,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -67,12 +61,9 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The resource name of the Organization to fetch, e.g. "organizations/1234".
-$name = 'organizations/{MY-ORGANIZATION}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'organizations/my-organization'
 
 $response = $service->organizations->get($name);
 
@@ -88,8 +79,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -97,9 +90,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -107,17 +97,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
+// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'organizations/my-organization'
 
-// TODO: Change placeholder below to desired parameter value for the `getIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'organizations/{MY-ORGANIZATION}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_GetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->organizations->getIamPolicy($resource, $requestBody);
 
@@ -133,8 +119,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -142,9 +130,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -152,12 +137,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_SearchOrganizationsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->organizations->search($requestBody, $optParams);
 
@@ -178,8 +161,10 @@ do {
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -187,9 +172,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -197,17 +179,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
+// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'organizations/my-organization'
 
-// TODO: Change placeholder below to desired parameter value for the `setIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'organizations/{MY-ORGANIZATION}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_SetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->organizations->setIamPolicy($resource, $requestBody);
 
@@ -223,8 +201,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -232,9 +212,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -242,17 +219,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `testIamPermissions` method:
-
 // REQUIRED: The resource for which the policy detail is being requested. `resource` is usually
 // specified as a path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'organizations/{MY-ORGANIZATION}';
-
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'organizations/my-organization'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_TestIamPermissionsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->organizations->testIamPermissions($resource, $requestBody);
 
@@ -268,8 +241,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -277,9 +252,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -287,10 +259,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_Project();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->create($requestBody);
 
@@ -306,8 +276,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -315,9 +287,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -325,12 +294,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // The Project ID (for example, `foo-bar-123`). Required.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
 $service->projects->delete($projectId);
 ?>
@@ -343,8 +308,10 @@ $service->projects->delete($projectId);
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -352,9 +319,6 @@ $service->projects->delete($projectId);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -362,12 +326,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The Project ID (for example, `my-project-123`). Required.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects->get($projectId);
 
@@ -383,8 +343,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -392,9 +354,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -402,17 +361,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
+// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
 
-// TODO: Change placeholder below to desired parameter value for the `getIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = '{MY-RESOURCE}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_GetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->getIamPolicy($resource, $requestBody);
 
@@ -428,8 +382,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -437,9 +393,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -447,8 +400,7 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects->listProjects($optParams);
 
@@ -469,8 +421,10 @@ do {
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -478,9 +432,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -488,17 +439,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
+// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
 
-// TODO: Change placeholder below to desired parameter value for the `setIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = '{MY-RESOURCE}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_SetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->setIamPolicy($resource, $requestBody);
 
@@ -514,8 +460,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -523,9 +471,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -533,17 +478,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `testIamPermissions` method:
-
 // REQUIRED: The resource for which the policy detail is being requested. `resource` is usually
 // specified as a path. For example, a Project resource is specified as `projects/{project}`.
-$resource = '{MY-RESOURCE}';
-
+$resource = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_TestIamPermissionsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->testIamPermissions($resource, $requestBody);
 
@@ -559,8 +499,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -568,9 +510,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -578,16 +517,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `undelete` method:
-
 // The project ID (for example, `foo-bar-123`). Required.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_UndeleteProjectRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->projects->undelete($projectId, $requestBody);
 ?>
@@ -600,8 +534,10 @@ $service->projects->undelete($projectId, $requestBody);
  *    https://console.developers.google.com/apis/api/cloudresourcemanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -609,9 +545,6 @@ $service->projects->undelete($projectId, $requestBody);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudResourceManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -619,16 +552,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudResourceManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // The project ID (for example, `my-project-123`). Required.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudResourceManager_Project();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->update($projectId, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudtrace.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudtrace.v1.json.baseline
index 093be9fae6..df788efc8e 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudtrace.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_cloudtrace.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/cloudtrace
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudTraceSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,16 +26,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudTrace($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `patchTraces` method:
-
 // ID of the Cloud project where the trace data is stored.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_CloudTrace_Traces();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $service->projects->patchTraces($projectId, $requestBody);
 ?>
@@ -49,8 +44,10 @@ $service->projects->patchTraces($projectId, $requestBody);
  *    https://console.developers.google.com/apis/api/cloudtrace
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -58,9 +55,6 @@ $service->projects->patchTraces($projectId, $requestBody);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudTraceSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -68,15 +62,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudTrace($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // ID of the Cloud project where the trace data is stored.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // ID of the trace to return.
-$traceId = '{MY-TRACE-ID}';
-
+$traceId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_traces->get($projectId, $traceId);
 
@@ -92,8 +82,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/cloudtrace
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -101,9 +93,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudTraceSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -111,14 +100,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudTrace($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsTraces` method:
-
 // ID of the Cloud project where the trace data is stored.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_traces->listProjectsTraces($projectId, $optParams);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouduseraccounts.beta.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouduseraccounts.beta.json.baseline
index fb319925df..40dadf196b 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouduseraccounts.beta.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_clouduseraccounts.beta.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,15 +26,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to delete.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $service->globalAccountsOperations->delete($project, $operation);
 ?>
@@ -48,8 +43,10 @@ $service->globalAccountsOperations->delete($project, $operation);
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -57,9 +54,6 @@ $service->globalAccountsOperations->delete($project, $operation);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -67,15 +61,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to return.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->globalAccountsOperations->get($project, $operation);
 
@@ -91,8 +81,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -100,9 +92,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -110,14 +99,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listGlobalAccountsOperations` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->globalAccountsOperations->listGlobalAccountsOperations($project, $optParams);
 
@@ -138,8 +123,10 @@ do {
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -147,9 +134,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -157,19 +141,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addMember` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the group for this request.
-$groupName = '{MY-GROUP-NAME}';
-
+$groupName = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudUserAccounts_GroupsAddMemberRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->groups->addMember($project, $groupName, $requestBody);
 
@@ -185,8 +164,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -194,9 +175,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -204,15 +182,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Group resource to delete.
-$groupName = '{MY-GROUP-NAME}';
-
+$groupName = '';  // TODO: Update placeholder value.
 
 $response = $service->groups->delete($project, $groupName);
 
@@ -228,8 +202,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -237,9 +213,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -247,15 +220,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Group resource to return.
-$groupName = '{MY-GROUP-NAME}';
-
+$groupName = '';  // TODO: Update placeholder value.
 
 $response = $service->groups->get($project, $groupName);
 
@@ -271,8 +240,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -280,9 +251,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -290,16 +258,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudUserAccounts_Group();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->groups->insert($project, $requestBody);
 
@@ -315,8 +278,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -324,9 +289,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -334,14 +296,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listGroups` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->groups->listGroups($project, $optParams);
 
@@ -362,8 +320,10 @@ do {
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -371,9 +331,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -381,19 +338,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `removeMember` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the group for this request.
-$groupName = '{MY-GROUP-NAME}';
-
+$groupName = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudUserAccounts_GroupsRemoveMemberRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->groups->removeMember($project, $groupName, $requestBody);
 
@@ -409,8 +361,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -418,9 +372,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -428,21 +379,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getAuthorizedKeysView` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The user account for which you want to get a list of authorized public keys.
-$user = '{MY-USER}';
+$user = '';  // TODO: Update placeholder value.
 
 // The fully-qualified URL of the virtual machine requesting the view.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->linux->getAuthorizedKeysView($project, $zone, $user, $instance);
 
@@ -458,8 +405,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -467,9 +416,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -477,18 +423,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getLinuxAccountViews` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The fully-qualified URL of the virtual machine requesting the views.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->linux->getLinuxAccountViews($project, $zone, $instance);
 
@@ -504,8 +446,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -513,9 +457,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -523,19 +464,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addPublicKey` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the user for this request.
-$user = '{MY-USER}';
-
+$user = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudUserAccounts_PublicKey();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->users->addPublicKey($project, $user, $requestBody);
 
@@ -551,8 +487,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -560,9 +498,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -570,15 +505,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the user resource to delete.
-$user = '{MY-USER}';
-
+$user = '';  // TODO: Update placeholder value.
 
 $response = $service->users->delete($project, $user);
 
@@ -594,8 +525,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -603,9 +536,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -613,15 +543,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the user resource to return.
-$user = '{MY-USER}';
-
+$user = '';  // TODO: Update placeholder value.
 
 $response = $service->users->get($project, $user);
 
@@ -637,8 +563,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -646,9 +574,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -656,16 +581,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_CloudUserAccounts_User();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->users->insert($project, $requestBody);
 
@@ -681,8 +601,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -690,9 +612,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -700,14 +619,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listUsers` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->users->listUsers($project, $optParams);
 
@@ -728,8 +643,10 @@ do {
  *    https://console.developers.google.com/apis/api/clouduseraccounts
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -737,9 +654,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-CloudUserAccountsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -747,19 +661,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_CloudUserAccounts($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `removePublicKey` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the user for this request.
-$user = '{MY-USER}';
+$user = '';  // TODO: Update placeholder value.
 
 // The fingerprint of the public key to delete. Public keys are identified by their fingerprint, which
 // is defined by RFC4716 to be the MD5 digest of the public key.
-$fingerprint = '{MY-FINGERPRINT}';
-
+$fingerprint = '';  // TODO: Update placeholder value.
 
 $response = $service->users->removePublicKey($project, $user, $fingerprint);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_compute.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_compute.v1.json.baseline
index 226a37e6cc..d44a51e6c6 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_compute.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_compute.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,20 +26,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->addresses->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $addresses_scoped_list) {
-    // TODO: Change code below to process each ($name => $addresses_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($addresses_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $addressesScopedList) {
+    // TODO: Change code below to process each (name => addressesScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($addressesScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -55,8 +50,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -64,9 +61,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -74,18 +68,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the address resource to delete.
-$address = '{MY-ADDRESS}';
-
+$address = '';  // TODO: Update placeholder value.
 
 $response = $service->addresses->delete($project, $region, $address);
 
@@ -101,8 +91,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -110,9 +102,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -120,18 +109,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the address resource to return.
-$address = '{MY-ADDRESS}';
-
+$address = '';  // TODO: Update placeholder value.
 
 $response = $service->addresses->get($project, $region, $address);
 
@@ -147,8 +132,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -156,9 +143,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -166,19 +150,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Address();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->addresses->insert($project, $region, $requestBody);
 
@@ -194,8 +173,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -203,9 +184,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -213,17 +191,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listAddresses` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->addresses->listAddresses($project, $region, $optParams);
 
@@ -244,8 +218,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -253,9 +229,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -263,20 +236,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->autoscalers->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $autoscalers_scoped_list) {
-    // TODO: Change code below to process each ($name => $autoscalers_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($autoscalers_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $autoscalersScopedList) {
+    // TODO: Change code below to process each (name => autoscalersScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($autoscalersScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -291,8 +260,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -300,9 +271,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -310,18 +278,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the autoscaler to delete.
-$autoscaler = '{MY-AUTOSCALER}';
-
+$autoscaler = '';  // TODO: Update placeholder value.
 
 $response = $service->autoscalers->delete($project, $zone, $autoscaler);
 
@@ -337,8 +301,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -346,9 +312,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -356,18 +319,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the autoscaler to return.
-$autoscaler = '{MY-AUTOSCALER}';
-
+$autoscaler = '';  // TODO: Update placeholder value.
 
 $response = $service->autoscalers->get($project, $zone, $autoscaler);
 
@@ -383,8 +342,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -392,9 +353,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -402,19 +360,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Autoscaler();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->autoscalers->insert($project, $zone, $requestBody);
 
@@ -430,8 +383,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -439,9 +394,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -449,17 +401,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listAutoscalers` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->autoscalers->listAutoscalers($project, $zone, $optParams);
 
@@ -480,8 +428,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -489,9 +439,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -499,22 +446,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the autoscaler to update.
-$autoscaler = '{MY-AUTOSCALER}';
-
+$autoscaler = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_Autoscaler();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->autoscalers->patch($project, $zone, $autoscaler, $requestBody);
 
@@ -530,8 +473,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -539,9 +484,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -549,19 +491,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Autoscaler();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->autoscalers->update($project, $zone, $requestBody);
 
@@ -577,8 +514,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -586,9 +525,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -596,15 +532,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the BackendService resource to delete.
-$backendService = '{MY-BACKEND-SERVICE}';
-
+$backendService = '';  // TODO: Update placeholder value.
 
 $response = $service->backendServices->delete($project, $backendService);
 
@@ -620,8 +552,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -629,9 +563,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -639,15 +570,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the BackendService resource to return.
-$backendService = '{MY-BACKEND-SERVICE}';
-
+$backendService = '';  // TODO: Update placeholder value.
 
 $response = $service->backendServices->get($project, $backendService);
 
@@ -663,8 +590,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -672,9 +601,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -682,19 +608,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getHealth` method:
-
-// project
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the BackendService resource to which the queried instance belongs.
-$backendService = '{MY-BACKEND-SERVICE}';
-
+$backendService = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_ResourceGroupReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->backendServices->getHealth($project, $backendService, $requestBody);
 
@@ -710,8 +630,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -719,9 +641,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -729,16 +648,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_BackendService();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->backendServices->insert($project, $requestBody);
 
@@ -754,8 +668,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -763,9 +679,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -773,20 +686,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listBackendServices` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->backendServices->listBackendServices($project, $optParams);
 
-  foreach ($response['items'] as $backend_service) {
-    // TODO: Change code below to process each `backend_service` resource:
-    echo '<pre>', var_export($backend_service, true), '</pre>', "\n";
+  foreach ($response['items'] as $backendService) {
+    // TODO: Change code below to process each `backendService` resource:
+    echo '<pre>', var_export($backendService, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -801,8 +710,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -810,9 +721,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -820,19 +728,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the BackendService resource to update.
-$backendService = '{MY-BACKEND-SERVICE}';
-
+$backendService = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_BackendService();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->backendServices->patch($project, $backendService, $requestBody);
 
@@ -848,8 +752,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -857,9 +763,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -867,19 +770,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the BackendService resource to update.
-$backendService = '{MY-BACKEND-SERVICE}';
-
+$backendService = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_BackendService();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->backendServices->update($project, $backendService, $requestBody);
 
@@ -895,8 +793,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -904,9 +804,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -914,20 +811,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->diskTypes->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $disk_types_scoped_list) {
-    // TODO: Change code below to process each ($name => $disk_types_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($disk_types_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $diskTypesScopedList) {
+    // TODO: Change code below to process each (name => diskTypesScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($diskTypesScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -942,8 +835,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -951,9 +846,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -961,18 +853,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the disk type to return.
-$diskType = '{MY-DISK-TYPE}';
-
+$diskType = '';  // TODO: Update placeholder value.
 
 $response = $service->diskTypes->get($project, $zone, $diskType);
 
@@ -988,8 +876,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -997,9 +887,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1007,23 +894,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listDiskTypes` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->diskTypes->listDiskTypes($project, $zone, $optParams);
 
-  foreach ($response['items'] as $disk_type) {
-    // TODO: Change code below to process each `disk_type` resource:
-    echo '<pre>', var_export($disk_type, true), '</pre>', "\n";
+  foreach ($response['items'] as $diskType) {
+    // TODO: Change code below to process each `diskType` resource:
+    echo '<pre>', var_export($diskType, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -1038,8 +921,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1047,9 +932,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1057,20 +939,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->disks->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $disks_scoped_list) {
-    // TODO: Change code below to process each ($name => $disks_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($disks_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $disksScopedList) {
+    // TODO: Change code below to process each (name => disksScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($disksScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -1085,8 +963,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1094,9 +974,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1104,22 +981,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `createSnapshot` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the persistent disk to snapshot.
-$disk = '{MY-DISK}';
-
+$disk = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Snapshot();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->disks->createSnapshot($project, $zone, $disk, $requestBody);
 
@@ -1135,8 +1007,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1144,9 +1018,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1154,18 +1025,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the persistent disk to delete.
-$disk = '{MY-DISK}';
-
+$disk = '';  // TODO: Update placeholder value.
 
 $response = $service->disks->delete($project, $zone, $disk);
 
@@ -1181,8 +1048,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1190,9 +1059,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1200,18 +1066,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the persistent disk to return.
-$disk = '{MY-DISK}';
-
+$disk = '';  // TODO: Update placeholder value.
 
 $response = $service->disks->get($project, $zone, $disk);
 
@@ -1227,8 +1089,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1236,9 +1100,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1246,19 +1107,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Disk();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->disks->insert($project, $zone, $requestBody);
 
@@ -1274,8 +1130,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1283,9 +1141,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1293,17 +1148,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listDisks` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->disks->listDisks($project, $zone, $optParams);
 
@@ -1324,8 +1175,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1333,9 +1186,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1343,22 +1193,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `resize` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the persistent disk.
-$disk = '{MY-DISK}';
-
+$disk = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_DisksResizeRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->disks->resize($project, $zone, $disk, $requestBody);
 
@@ -1374,8 +1219,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1383,9 +1230,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1393,15 +1237,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the firewall rule to delete.
-$firewall = '{MY-FIREWALL}';
-
+$firewall = '';  // TODO: Update placeholder value.
 
 $response = $service->firewalls->delete($project, $firewall);
 
@@ -1417,8 +1257,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1426,9 +1268,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1436,15 +1275,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the firewall rule to return.
-$firewall = '{MY-FIREWALL}';
-
+$firewall = '';  // TODO: Update placeholder value.
 
 $response = $service->firewalls->get($project, $firewall);
 
@@ -1460,8 +1295,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1469,9 +1306,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1479,16 +1313,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Firewall();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->firewalls->insert($project, $requestBody);
 
@@ -1504,8 +1333,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1513,9 +1344,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1523,14 +1351,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listFirewalls` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->firewalls->listFirewalls($project, $optParams);
 
@@ -1551,8 +1375,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1560,9 +1386,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1570,19 +1393,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the firewall rule to update.
-$firewall = '{MY-FIREWALL}';
-
+$firewall = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_Firewall();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->firewalls->patch($project, $firewall, $requestBody);
 
@@ -1598,8 +1417,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1607,9 +1428,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1617,19 +1435,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the firewall rule to update.
-$firewall = '{MY-FIREWALL}';
-
+$firewall = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Firewall();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->firewalls->update($project, $firewall, $requestBody);
 
@@ -1645,8 +1458,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1654,9 +1469,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1664,20 +1476,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->forwardingRules->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $forwarding_rules_scoped_list) {
-    // TODO: Change code below to process each ($name => $forwarding_rules_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($forwarding_rules_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $forwardingRulesScopedList) {
+    // TODO: Change code below to process each (name => forwardingRulesScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($forwardingRulesScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -1692,8 +1500,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1701,9 +1511,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1711,18 +1518,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the ForwardingRule resource to delete.
-$forwardingRule = '{MY-FORWARDING-RULE}';
-
+$forwardingRule = '';  // TODO: Update placeholder value.
 
 $response = $service->forwardingRules->delete($project, $region, $forwardingRule);
 
@@ -1738,8 +1541,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1747,9 +1552,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1757,18 +1559,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the ForwardingRule resource to return.
-$forwardingRule = '{MY-FORWARDING-RULE}';
-
+$forwardingRule = '';  // TODO: Update placeholder value.
 
 $response = $service->forwardingRules->get($project, $region, $forwardingRule);
 
@@ -1784,8 +1582,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1793,9 +1593,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1803,19 +1600,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_ForwardingRule();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->forwardingRules->insert($project, $region, $requestBody);
 
@@ -1831,8 +1623,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1840,9 +1634,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1850,23 +1641,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listForwardingRules` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->forwardingRules->listForwardingRules($project, $region, $optParams);
 
-  foreach ($response['items'] as $forwarding_rule) {
-    // TODO: Change code below to process each `forwarding_rule` resource:
-    echo '<pre>', var_export($forwarding_rule, true), '</pre>', "\n";
+  foreach ($response['items'] as $forwardingRule) {
+    // TODO: Change code below to process each `forwardingRule` resource:
+    echo '<pre>', var_export($forwardingRule, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -1881,8 +1668,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1890,9 +1679,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1900,22 +1686,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setTarget` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the ForwardingRule resource in which target is to be set.
-$forwardingRule = '{MY-FORWARDING-RULE}';
-
+$forwardingRule = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->forwardingRules->setTarget($project, $region, $forwardingRule, $requestBody);
 
@@ -1931,8 +1712,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1940,9 +1723,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1950,15 +1730,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the address resource to delete.
-$address = '{MY-ADDRESS}';
-
+$address = '';  // TODO: Update placeholder value.
 
 $response = $service->globalAddresses->delete($project, $address);
 
@@ -1974,8 +1750,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1983,9 +1761,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1993,15 +1768,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the address resource to return.
-$address = '{MY-ADDRESS}';
-
+$address = '';  // TODO: Update placeholder value.
 
 $response = $service->globalAddresses->get($project, $address);
 
@@ -2017,8 +1788,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2026,9 +1799,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2036,16 +1806,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Address();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->globalAddresses->insert($project, $requestBody);
 
@@ -2061,8 +1826,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2070,9 +1837,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2080,14 +1844,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listGlobalAddresses` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->globalAddresses->listGlobalAddresses($project, $optParams);
 
@@ -2108,8 +1868,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2117,9 +1879,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2127,15 +1886,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the ForwardingRule resource to delete.
-$forwardingRule = '{MY-FORWARDING-RULE}';
-
+$forwardingRule = '';  // TODO: Update placeholder value.
 
 $response = $service->globalForwardingRules->delete($project, $forwardingRule);
 
@@ -2151,8 +1906,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2160,9 +1917,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2170,15 +1924,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the ForwardingRule resource to return.
-$forwardingRule = '{MY-FORWARDING-RULE}';
-
+$forwardingRule = '';  // TODO: Update placeholder value.
 
 $response = $service->globalForwardingRules->get($project, $forwardingRule);
 
@@ -2194,8 +1944,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2203,9 +1955,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2213,16 +1962,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_ForwardingRule();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->globalForwardingRules->insert($project, $requestBody);
 
@@ -2238,8 +1982,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2247,9 +1993,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2257,20 +2000,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listGlobalForwardingRules` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->globalForwardingRules->listGlobalForwardingRules($project, $optParams);
 
-  foreach ($response['items'] as $forwarding_rule) {
-    // TODO: Change code below to process each `forwarding_rule` resource:
-    echo '<pre>', var_export($forwarding_rule, true), '</pre>', "\n";
+  foreach ($response['items'] as $forwardingRule) {
+    // TODO: Change code below to process each `forwardingRule` resource:
+    echo '<pre>', var_export($forwardingRule, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -2285,8 +2024,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2294,9 +2035,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2304,19 +2042,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setTarget` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the ForwardingRule resource in which target is to be set.
-$forwardingRule = '{MY-FORWARDING-RULE}';
-
+$forwardingRule = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->globalForwardingRules->setTarget($project, $forwardingRule, $requestBody);
 
@@ -2332,8 +2065,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2341,9 +2076,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2351,20 +2083,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->globalOperations->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $operations_scoped_list) {
-    // TODO: Change code below to process each ($name => $operations_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($operations_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $operationsScopedList) {
+    // TODO: Change code below to process each (name => operationsScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($operationsScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -2379,8 +2107,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2388,9 +2118,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2398,15 +2125,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to delete.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $service->globalOperations->delete($project, $operation);
 ?>
@@ -2419,8 +2142,10 @@ $service->globalOperations->delete($project, $operation);
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2428,9 +2153,6 @@ $service->globalOperations->delete($project, $operation);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2438,15 +2160,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to return.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->globalOperations->get($project, $operation);
 
@@ -2462,8 +2180,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2471,9 +2191,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2481,14 +2198,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listGlobalOperations` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->globalOperations->listGlobalOperations($project, $optParams);
 
@@ -2509,8 +2222,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2518,9 +2233,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2528,15 +2240,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HealthCheck resource to delete.
-$healthCheck = '{MY-HEALTH-CHECK}';
-
+$healthCheck = '';  // TODO: Update placeholder value.
 
 $response = $service->healthChecks->delete($project, $healthCheck);
 
@@ -2552,8 +2260,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2561,9 +2271,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2571,15 +2278,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HealthCheck resource to return.
-$healthCheck = '{MY-HEALTH-CHECK}';
-
+$healthCheck = '';  // TODO: Update placeholder value.
 
 $response = $service->healthChecks->get($project, $healthCheck);
 
@@ -2595,8 +2298,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2604,9 +2309,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2614,16 +2316,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_HealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->healthChecks->insert($project, $requestBody);
 
@@ -2639,8 +2336,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2648,9 +2347,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2658,20 +2354,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listHealthChecks` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->healthChecks->listHealthChecks($project, $optParams);
 
-  foreach ($response['items'] as $health_check) {
-    // TODO: Change code below to process each `health_check` resource:
-    echo '<pre>', var_export($health_check, true), '</pre>', "\n";
+  foreach ($response['items'] as $healthCheck) {
+    // TODO: Change code below to process each `healthCheck` resource:
+    echo '<pre>', var_export($healthCheck, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -2686,8 +2378,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2695,9 +2389,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2705,19 +2396,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HealthCheck resource to update.
-$healthCheck = '{MY-HEALTH-CHECK}';
-
+$healthCheck = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_HealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->healthChecks->patch($project, $healthCheck, $requestBody);
 
@@ -2733,8 +2420,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2742,9 +2431,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2752,19 +2438,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HealthCheck resource to update.
-$healthCheck = '{MY-HEALTH-CHECK}';
-
+$healthCheck = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_HealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->healthChecks->update($project, $healthCheck, $requestBody);
 
@@ -2780,8 +2461,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2789,9 +2472,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2799,15 +2479,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpHealthCheck resource to delete.
-$httpHealthCheck = '{MY-HTTP-HEALTH-CHECK}';
-
+$httpHealthCheck = '';  // TODO: Update placeholder value.
 
 $response = $service->httpHealthChecks->delete($project, $httpHealthCheck);
 
@@ -2823,8 +2499,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2832,9 +2510,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2842,15 +2517,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpHealthCheck resource to return.
-$httpHealthCheck = '{MY-HTTP-HEALTH-CHECK}';
-
+$httpHealthCheck = '';  // TODO: Update placeholder value.
 
 $response = $service->httpHealthChecks->get($project, $httpHealthCheck);
 
@@ -2866,8 +2537,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2875,9 +2548,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2885,16 +2555,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_HttpHealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->httpHealthChecks->insert($project, $requestBody);
 
@@ -2910,8 +2575,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2919,9 +2586,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2929,20 +2593,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listHttpHealthChecks` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->httpHealthChecks->listHttpHealthChecks($project, $optParams);
 
-  foreach ($response['items'] as $http_health_check) {
-    // TODO: Change code below to process each `http_health_check` resource:
-    echo '<pre>', var_export($http_health_check, true), '</pre>', "\n";
+  foreach ($response['items'] as $httpHealthCheck) {
+    // TODO: Change code below to process each `httpHealthCheck` resource:
+    echo '<pre>', var_export($httpHealthCheck, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -2957,8 +2617,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -2966,9 +2628,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -2976,19 +2635,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpHealthCheck resource to update.
-$httpHealthCheck = '{MY-HTTP-HEALTH-CHECK}';
-
+$httpHealthCheck = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_HttpHealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->httpHealthChecks->patch($project, $httpHealthCheck, $requestBody);
 
@@ -3004,8 +2659,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3013,9 +2670,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3023,19 +2677,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpHealthCheck resource to update.
-$httpHealthCheck = '{MY-HTTP-HEALTH-CHECK}';
-
+$httpHealthCheck = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_HttpHealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->httpHealthChecks->update($project, $httpHealthCheck, $requestBody);
 
@@ -3051,8 +2700,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3060,9 +2711,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3070,15 +2718,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpsHealthCheck resource to delete.
-$httpsHealthCheck = '{MY-HTTPS-HEALTH-CHECK}';
-
+$httpsHealthCheck = '';  // TODO: Update placeholder value.
 
 $response = $service->httpsHealthChecks->delete($project, $httpsHealthCheck);
 
@@ -3094,8 +2738,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3103,9 +2749,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3113,15 +2756,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpsHealthCheck resource to return.
-$httpsHealthCheck = '{MY-HTTPS-HEALTH-CHECK}';
-
+$httpsHealthCheck = '';  // TODO: Update placeholder value.
 
 $response = $service->httpsHealthChecks->get($project, $httpsHealthCheck);
 
@@ -3137,8 +2776,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3146,9 +2787,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3156,16 +2794,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_HttpsHealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->httpsHealthChecks->insert($project, $requestBody);
 
@@ -3181,8 +2814,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3190,9 +2825,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3200,20 +2832,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listHttpsHealthChecks` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->httpsHealthChecks->listHttpsHealthChecks($project, $optParams);
 
-  foreach ($response['items'] as $https_health_check) {
-    // TODO: Change code below to process each `https_health_check` resource:
-    echo '<pre>', var_export($https_health_check, true), '</pre>', "\n";
+  foreach ($response['items'] as $httpsHealthCheck) {
+    // TODO: Change code below to process each `httpsHealthCheck` resource:
+    echo '<pre>', var_export($httpsHealthCheck, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -3228,8 +2856,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3237,9 +2867,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3247,19 +2874,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpsHealthCheck resource to update.
-$httpsHealthCheck = '{MY-HTTPS-HEALTH-CHECK}';
-
+$httpsHealthCheck = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_HttpsHealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->httpsHealthChecks->patch($project, $httpsHealthCheck, $requestBody);
 
@@ -3275,8 +2898,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3284,9 +2909,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3294,19 +2916,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the HttpsHealthCheck resource to update.
-$httpsHealthCheck = '{MY-HTTPS-HEALTH-CHECK}';
-
+$httpsHealthCheck = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_HttpsHealthCheck();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->httpsHealthChecks->update($project, $httpsHealthCheck, $requestBody);
 
@@ -3322,8 +2939,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3331,9 +2950,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3341,15 +2957,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the image resource to delete.
-$image = '{MY-IMAGE}';
-
+$image = '';  // TODO: Update placeholder value.
 
 $response = $service->images->delete($project, $image);
 
@@ -3365,8 +2977,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3374,9 +2988,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3384,19 +2995,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `deprecate` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Image name.
-$image = '{MY-IMAGE}';
-
+$image = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_DeprecationStatus();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->images->deprecate($project, $image, $requestBody);
 
@@ -3412,8 +3018,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3421,9 +3029,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3431,15 +3036,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the image resource to return.
-$image = '{MY-IMAGE}';
-
+$image = '';  // TODO: Update placeholder value.
 
 $response = $service->images->get($project, $image);
 
@@ -3455,8 +3056,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3464,9 +3067,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3474,15 +3074,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getFromFamily` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the image family to search for.
-$family = '{MY-FAMILY}';
-
+$family = '';  // TODO: Update placeholder value.
 
 $response = $service->images->getFromFamily($project, $family);
 
@@ -3498,8 +3094,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3507,9 +3105,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3517,16 +3112,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Image();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->images->insert($project, $requestBody);
 
@@ -3542,8 +3132,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3551,9 +3143,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3561,14 +3150,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listImages` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->images->listImages($project, $optParams);
 
@@ -3589,8 +3174,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3598,9 +3185,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3608,22 +3192,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `abandonInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupManagersAbandonInstancesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroupManagers->abandonInstances($project, $zone, $instanceGroupManager, $requestBody);
 
@@ -3639,8 +3218,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3648,9 +3229,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3658,20 +3236,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instanceGroupManagers->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $instance_group_managers_scoped_list) {
-    // TODO: Change code below to process each ($name => $instance_group_managers_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($instance_group_managers_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $instanceGroupManagersScopedList) {
+    // TODO: Change code below to process each (name => instanceGroupManagersScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($instanceGroupManagersScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -3686,8 +3260,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3695,9 +3271,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3705,18 +3278,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group to delete.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceGroupManagers->delete($project, $zone, $instanceGroupManager);
 
@@ -3732,8 +3301,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3741,9 +3312,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3751,22 +3319,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `deleteInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupManagersDeleteInstancesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroupManagers->deleteInstances($project, $zone, $instanceGroupManager, $requestBody);
 
@@ -3782,8 +3345,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3791,9 +3356,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3801,18 +3363,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceGroupManagers->get($project, $zone, $instanceGroupManager);
 
@@ -3828,8 +3386,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3837,9 +3397,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3847,19 +3404,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where you want to create the managed instance group.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupManager();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroupManagers->insert($project, $zone, $requestBody);
 
@@ -3875,8 +3427,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3884,9 +3438,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3894,23 +3445,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listInstanceGroupManagers` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instanceGroupManagers->listInstanceGroupManagers($project, $zone, $optParams);
 
-  foreach ($response['items'] as $instance_group_manager) {
-    // TODO: Change code below to process each `instance_group_manager` resource:
-    echo '<pre>', var_export($instance_group_manager, true), '</pre>', "\n";
+  foreach ($response['items'] as $instanceGroupManager) {
+    // TODO: Change code below to process each `instanceGroupManager` resource:
+    echo '<pre>', var_export($instanceGroupManager, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -3925,8 +3472,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3934,9 +3483,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3944,18 +3490,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listManagedInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceGroupManagers->listManagedInstances($project, $zone, $instanceGroupManager);
 
@@ -3971,8 +3513,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -3980,9 +3524,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -3990,22 +3531,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `recreateInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupManagersRecreateInstancesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroupManagers->recreateInstances($project, $zone, $instanceGroupManager, $requestBody);
 
@@ -4021,8 +3557,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4030,9 +3568,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4040,23 +3575,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `resize` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
 // The number of running instances that the managed instance group should maintain at any given time.
 // The group automatically adds or removes instances to maintain the number of instances specified by
 // this parameter.
-$size = 0;
-
+$size = 0;  // TODO: Update placeholder value.
 
 $response = $service->instanceGroupManagers->resize($project, $zone, $instanceGroupManager, $size);
 
@@ -4072,8 +3603,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4081,9 +3614,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4091,22 +3621,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setInstanceTemplate` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupManagersSetInstanceTemplateRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroupManagers->setInstanceTemplate($project, $zone, $instanceGroupManager, $requestBody);
 
@@ -4122,8 +3647,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4131,9 +3658,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4141,22 +3665,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setTargetPools` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the managed instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the managed instance group.
-$instanceGroupManager = '{MY-INSTANCE-GROUP-MANAGER}';
-
+$instanceGroupManager = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupManagersSetTargetPoolsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroupManagers->setTargetPools($project, $zone, $instanceGroupManager, $requestBody);
 
@@ -4172,8 +3691,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4181,9 +3702,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4191,22 +3709,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the instance group where you are adding instances.
-$instanceGroup = '{MY-INSTANCE-GROUP}';
-
+$instanceGroup = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupsAddInstancesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroups->addInstances($project, $zone, $instanceGroup, $requestBody);
 
@@ -4222,8 +3735,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4231,9 +3746,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4241,20 +3753,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instanceGroups->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $instance_groups_scoped_list) {
-    // TODO: Change code below to process each ($name => $instance_groups_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($instance_groups_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $instanceGroupsScopedList) {
+    // TODO: Change code below to process each (name => instanceGroupsScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($instanceGroupsScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -4269,8 +3777,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4278,9 +3788,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4288,18 +3795,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the instance group to delete.
-$instanceGroup = '{MY-INSTANCE-GROUP}';
-
+$instanceGroup = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceGroups->delete($project, $zone, $instanceGroup);
 
@@ -4315,8 +3818,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4324,9 +3829,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4334,18 +3836,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the instance group.
-$instanceGroup = '{MY-INSTANCE-GROUP}';
-
+$instanceGroup = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceGroups->get($project, $zone, $instanceGroup);
 
@@ -4361,8 +3859,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4370,9 +3870,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4380,19 +3877,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where you want to create the instance group.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroups->insert($project, $zone, $requestBody);
 
@@ -4408,8 +3900,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4417,9 +3911,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4427,23 +3918,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listInstanceGroups` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instanceGroups->listInstanceGroups($project, $zone, $optParams);
 
-  foreach ($response['items'] as $instance_group) {
-    // TODO: Change code below to process each `instance_group` resource:
-    echo '<pre>', var_export($instance_group, true), '</pre>', "\n";
+  foreach ($response['items'] as $instanceGroup) {
+    // TODO: Change code below to process each `instanceGroup` resource:
+    echo '<pre>', var_export($instanceGroup, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -4458,8 +3945,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4467,9 +3956,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4477,30 +3963,25 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the instance group from which you want to generate a list of included instances.
-$instanceGroup = '{MY-INSTANCE-GROUP}';
-
+$instanceGroup = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupsListInstancesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instanceGroups->listInstances($project, $zone, $instanceGroup, $requestBody, $optParams);
 
-  foreach ($response['items'] as $instance_with_named_ports) {
-    // TODO: Change code below to process each `instance_with_named_ports` resource:
-    echo '<pre>', var_export($instance_with_named_ports, true), '</pre>', "\n";
+  foreach ($response['items'] as $instanceWithNamedPorts) {
+    // TODO: Change code below to process each `instanceWithNamedPorts` resource:
+    echo '<pre>', var_export($instanceWithNamedPorts, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -4515,8 +3996,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4524,9 +4007,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4534,22 +4014,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `removeInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the instance group where the specified instances will be removed.
-$instanceGroup = '{MY-INSTANCE-GROUP}';
-
+$instanceGroup = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupsRemoveInstancesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroups->removeInstances($project, $zone, $instanceGroup, $requestBody);
 
@@ -4565,8 +4040,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4574,9 +4051,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4584,22 +4058,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setNamedPorts` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone where the instance group is located.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the instance group where the named ports are updated.
-$instanceGroup = '{MY-INSTANCE-GROUP}';
-
+$instanceGroup = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceGroupsSetNamedPortsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceGroups->setNamedPorts($project, $zone, $instanceGroup, $requestBody);
 
@@ -4615,8 +4084,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4624,9 +4095,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4634,15 +4102,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the instance template to delete.
-$instanceTemplate = '{MY-INSTANCE-TEMPLATE}';
-
+$instanceTemplate = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceTemplates->delete($project, $instanceTemplate);
 
@@ -4658,8 +4122,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4667,9 +4133,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4677,15 +4140,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the instance template.
-$instanceTemplate = '{MY-INSTANCE-TEMPLATE}';
-
+$instanceTemplate = '';  // TODO: Update placeholder value.
 
 $response = $service->instanceTemplates->get($project, $instanceTemplate);
 
@@ -4701,8 +4160,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4710,9 +4171,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4720,16 +4178,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceTemplate();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instanceTemplates->insert($project, $requestBody);
 
@@ -4745,8 +4198,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4754,9 +4209,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4764,20 +4216,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listInstanceTemplates` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instanceTemplates->listInstanceTemplates($project, $optParams);
 
-  foreach ($response['items'] as $instance_template) {
-    // TODO: Change code below to process each `instance_template` resource:
-    echo '<pre>', var_export($instance_template, true), '</pre>', "\n";
+  foreach ($response['items'] as $instanceTemplate) {
+    // TODO: Change code below to process each `instanceTemplate` resource:
+    echo '<pre>', var_export($instanceTemplate, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -4792,8 +4240,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4801,9 +4251,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4811,25 +4258,20 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addAccessConfig` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The instance name for this request.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // The name of the network interface to add to this instance.
-$networkInterface = '{MY-NETWORK-INTERFACE}';
-
+$networkInterface = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_AccessConfig();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->addAccessConfig($project, $zone, $instance, $networkInterface, $requestBody);
 
@@ -4845,8 +4287,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4854,9 +4298,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4864,20 +4305,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instances->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $instances_scoped_list) {
-    // TODO: Change code below to process each ($name => $instances_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($instances_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $instancesScopedList) {
+    // TODO: Change code below to process each (name => instancesScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($instancesScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -4892,8 +4329,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4901,9 +4340,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4911,22 +4347,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `attachDisk` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The instance name for this request.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_AttachedDisk();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->attachDisk($project, $zone, $instance, $requestBody);
 
@@ -4942,8 +4373,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4951,9 +4384,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -4961,18 +4391,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance resource to delete.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->delete($project, $zone, $instance);
 
@@ -4988,8 +4414,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -4997,9 +4425,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5007,24 +4432,20 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `deleteAccessConfig` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The instance name for this request.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // The name of the access config to delete.
-$accessConfig = '{MY-ACCESS-CONFIG}';
+$accessConfig = '';  // TODO: Update placeholder value.
 
 // The name of the network interface.
-$networkInterface = '{MY-NETWORK-INTERFACE}';
-
+$networkInterface = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->deleteAccessConfig($project, $zone, $instance, $accessConfig, $networkInterface);
 
@@ -5040,8 +4461,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5049,9 +4472,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5059,21 +4479,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `detachDisk` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Instance name.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Disk device name to detach.
-$deviceName = '{MY-DEVICE-NAME}';
-
+$deviceName = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->detachDisk($project, $zone, $instance, $deviceName);
 
@@ -5089,8 +4505,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5098,9 +4516,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5108,18 +4523,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance resource to return.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->get($project, $zone, $instance);
 
@@ -5135,8 +4546,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5144,9 +4557,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5154,18 +4564,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getSerialPortOutput` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance scoping this request.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->getSerialPortOutput($project, $zone, $instance);
 
@@ -5181,8 +4587,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5190,9 +4598,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5200,19 +4605,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Instance();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->insert($project, $zone, $requestBody);
 
@@ -5228,8 +4628,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5237,9 +4639,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5247,17 +4646,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instances->listInstances($project, $zone, $optParams);
 
@@ -5278,8 +4673,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5287,9 +4684,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5297,18 +4691,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `reset` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance scoping this request.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->reset($project, $zone, $instance);
 
@@ -5324,8 +4714,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5333,9 +4725,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5343,24 +4732,20 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setDiskAutoDelete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // The instance name.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Whether to auto-delete the disk when the instance is deleted.
-$autoDelete = false;
+$autoDelete = false;  // TODO: Update placeholder value.
 
 // The device name of the disk to modify.
-$deviceName = '{MY-DEVICE-NAME}';
-
+$deviceName = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->setDiskAutoDelete($project, $zone, $instance, $autoDelete, $deviceName);
 
@@ -5376,8 +4761,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5385,9 +4772,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5395,22 +4779,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setMachineType` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance scoping this request.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstancesSetMachineTypeRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->setMachineType($project, $zone, $instance, $requestBody);
 
@@ -5426,8 +4805,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5435,9 +4816,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5445,22 +4823,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setMetadata` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance scoping this request.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Metadata();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->setMetadata($project, $zone, $instance, $requestBody);
 
@@ -5476,8 +4849,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5485,9 +4860,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5495,22 +4867,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setScheduling` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Instance name.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Scheduling();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->setScheduling($project, $zone, $instance, $requestBody);
 
@@ -5526,8 +4893,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5535,9 +4904,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5545,22 +4911,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setTags` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance scoping this request.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Tags();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->setTags($project, $zone, $instance, $requestBody);
 
@@ -5576,8 +4937,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5585,9 +4948,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5595,18 +4955,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `start` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance resource to start.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->start($project, $zone, $instance);
 
@@ -5622,8 +4978,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5631,9 +4989,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5641,22 +4996,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `startWithEncryptionKey` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance resource to start.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstancesStartWithEncryptionKeyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->startWithEncryptionKey($project, $zone, $instance, $requestBody);
 
@@ -5672,8 +5022,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5681,9 +5033,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5691,18 +5040,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `stop` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the instance resource to stop.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->stop($project, $zone, $instance);
 
@@ -5718,8 +5063,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5727,9 +5074,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5737,15 +5081,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the License resource to return.
-$license = '{MY-LICENSE}';
-
+$license = '';  // TODO: Update placeholder value.
 
 $response = $service->licenses->get($project, $license);
 
@@ -5761,8 +5101,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5770,9 +5112,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5780,20 +5119,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->machineTypes->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $machine_types_scoped_list) {
-    // TODO: Change code below to process each ($name => $machine_types_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($machine_types_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $machineTypesScopedList) {
+    // TODO: Change code below to process each (name => machineTypesScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($machineTypesScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -5808,8 +5143,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5817,9 +5154,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5827,18 +5161,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the machine type to return.
-$machineType = '{MY-MACHINE-TYPE}';
-
+$machineType = '';  // TODO: Update placeholder value.
 
 $response = $service->machineTypes->get($project, $zone, $machineType);
 
@@ -5854,8 +5184,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5863,9 +5195,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5873,23 +5202,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listMachineTypes` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->machineTypes->listMachineTypes($project, $zone, $optParams);
 
-  foreach ($response['items'] as $machine_type) {
-    // TODO: Change code below to process each `machine_type` resource:
-    echo '<pre>', var_export($machine_type, true), '</pre>', "\n";
+  foreach ($response['items'] as $machineType) {
+    // TODO: Change code below to process each `machineType` resource:
+    echo '<pre>', var_export($machineType, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -5904,8 +5229,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5913,9 +5240,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5923,15 +5247,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the network to delete.
-$network = '{MY-NETWORK}';
-
+$network = '';  // TODO: Update placeholder value.
 
 $response = $service->networks->delete($project, $network);
 
@@ -5947,8 +5267,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5956,9 +5278,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -5966,15 +5285,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the network to return.
-$network = '{MY-NETWORK}';
-
+$network = '';  // TODO: Update placeholder value.
 
 $response = $service->networks->get($project, $network);
 
@@ -5990,8 +5305,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -5999,9 +5316,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6009,16 +5323,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Network();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->networks->insert($project, $requestBody);
 
@@ -6034,8 +5343,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6043,9 +5354,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6053,14 +5361,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listNetworks` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->networks->listNetworks($project, $optParams);
 
@@ -6081,8 +5385,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6090,9 +5396,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6100,12 +5403,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
 $response = $service->projects->get($project);
 
@@ -6121,8 +5420,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6130,9 +5431,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6140,16 +5438,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `moveDisk` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_DiskMoveRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->moveDisk($project, $requestBody);
 
@@ -6165,8 +5458,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6174,9 +5469,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6184,16 +5476,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `moveInstance` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceMoveRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->moveInstance($project, $requestBody);
 
@@ -6209,8 +5496,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6218,9 +5507,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6228,16 +5514,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `setCommonInstanceMetadata` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Metadata();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->setCommonInstanceMetadata($project, $requestBody);
 
@@ -6253,8 +5534,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6262,9 +5545,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6272,16 +5552,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `setUsageExportBucket` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_UsageExportLocation();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->setUsageExportBucket($project, $requestBody);
 
@@ -6297,8 +5572,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6306,9 +5583,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6316,18 +5590,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to delete.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $service->regionOperations->delete($project, $region, $operation);
 ?>
@@ -6340,8 +5610,10 @@ $service->regionOperations->delete($project, $region, $operation);
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6349,9 +5621,6 @@ $service->regionOperations->delete($project, $region, $operation);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6359,18 +5628,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to return.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->regionOperations->get($project, $region, $operation);
 
@@ -6386,8 +5651,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6395,9 +5662,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6405,17 +5669,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listRegionOperations` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->regionOperations->listRegionOperations($project, $region, $optParams);
 
@@ -6436,8 +5696,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6445,9 +5707,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6455,15 +5714,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region resource to return.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
 $response = $service->regions->get($project, $region);
 
@@ -6479,8 +5734,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6488,9 +5745,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6498,14 +5752,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listRegions` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->regions->listRegions($project, $optParams);
 
@@ -6526,8 +5776,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6535,9 +5787,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6545,20 +5794,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->routers->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $routers_scoped_list) {
-    // TODO: Change code below to process each ($name => $routers_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($routers_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $routersScopedList) {
+    // TODO: Change code below to process each (name => routersScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($routersScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -6573,8 +5818,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6582,9 +5829,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6592,18 +5836,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Router resource to delete.
-$router = '{MY-ROUTER}';
-
+$router = '';  // TODO: Update placeholder value.
 
 $response = $service->routers->delete($project, $region, $router);
 
@@ -6619,8 +5859,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6628,9 +5870,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6638,18 +5877,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Router resource to return.
-$router = '{MY-ROUTER}';
-
+$router = '';  // TODO: Update placeholder value.
 
 $response = $service->routers->get($project, $region, $router);
 
@@ -6665,8 +5900,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6674,9 +5911,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6684,18 +5918,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getRouterStatus` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Router resource to query.
-$router = '{MY-ROUTER}';
-
+$router = '';  // TODO: Update placeholder value.
 
 $response = $service->routers->getRouterStatus($project, $region, $router);
 
@@ -6711,8 +5941,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6720,9 +5952,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6730,19 +5959,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Router();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->routers->insert($project, $region, $requestBody);
 
@@ -6758,8 +5982,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6767,9 +5993,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6777,17 +6000,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listRouters` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->routers->listRouters($project, $region, $optParams);
 
@@ -6808,8 +6027,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6817,9 +6038,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6827,22 +6045,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Router resource to update.
-$router = '{MY-ROUTER}';
-
+$router = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_Router();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->routers->patch($project, $region, $router, $requestBody);
 
@@ -6858,8 +6072,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6867,9 +6083,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6877,22 +6090,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `preview` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Router resource to query.
-$router = '{MY-ROUTER}';
-
+$router = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Router();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->routers->preview($project, $region, $router, $requestBody);
 
@@ -6908,8 +6116,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6917,9 +6127,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6927,22 +6134,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Router resource to update.
-$router = '{MY-ROUTER}';
-
+$router = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Router();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->routers->update($project, $region, $router, $requestBody);
 
@@ -6958,8 +6160,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -6967,9 +6171,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -6977,15 +6178,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Route resource to delete.
-$route = '{MY-ROUTE}';
-
+$route = '';  // TODO: Update placeholder value.
 
 $response = $service->routes->delete($project, $route);
 
@@ -7001,8 +6198,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7010,9 +6209,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7020,15 +6216,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Route resource to return.
-$route = '{MY-ROUTE}';
-
+$route = '';  // TODO: Update placeholder value.
 
 $response = $service->routes->get($project, $route);
 
@@ -7044,8 +6236,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7053,9 +6247,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7063,16 +6254,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Route();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->routes->insert($project, $requestBody);
 
@@ -7088,8 +6274,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7097,9 +6285,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7107,14 +6292,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listRoutes` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->routes->listRoutes($project, $optParams);
 
@@ -7135,8 +6316,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7144,9 +6327,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7154,15 +6334,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Snapshot resource to delete.
-$snapshot = '{MY-SNAPSHOT}';
-
+$snapshot = '';  // TODO: Update placeholder value.
 
 $response = $service->snapshots->delete($project, $snapshot);
 
@@ -7178,8 +6354,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7187,9 +6365,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7197,15 +6372,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the Snapshot resource to return.
-$snapshot = '{MY-SNAPSHOT}';
-
+$snapshot = '';  // TODO: Update placeholder value.
 
 $response = $service->snapshots->get($project, $snapshot);
 
@@ -7221,8 +6392,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7230,9 +6403,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7240,14 +6410,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listSnapshots` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->snapshots->listSnapshots($project, $optParams);
 
@@ -7268,8 +6434,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7277,9 +6445,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7287,15 +6452,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the SslCertificate resource to delete.
-$sslCertificate = '{MY-SSL-CERTIFICATE}';
-
+$sslCertificate = '';  // TODO: Update placeholder value.
 
 $response = $service->sslCertificates->delete($project, $sslCertificate);
 
@@ -7311,8 +6472,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7320,9 +6483,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7330,15 +6490,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the SslCertificate resource to return.
-$sslCertificate = '{MY-SSL-CERTIFICATE}';
-
+$sslCertificate = '';  // TODO: Update placeholder value.
 
 $response = $service->sslCertificates->get($project, $sslCertificate);
 
@@ -7354,8 +6510,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7363,9 +6521,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7373,16 +6528,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_SslCertificate();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->sslCertificates->insert($project, $requestBody);
 
@@ -7398,8 +6548,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7407,9 +6559,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7417,20 +6566,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listSslCertificates` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->sslCertificates->listSslCertificates($project, $optParams);
 
-  foreach ($response['items'] as $ssl_certificate) {
-    // TODO: Change code below to process each `ssl_certificate` resource:
-    echo '<pre>', var_export($ssl_certificate, true), '</pre>', "\n";
+  foreach ($response['items'] as $sslCertificate) {
+    // TODO: Change code below to process each `sslCertificate` resource:
+    echo '<pre>', var_export($sslCertificate, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -7445,8 +6590,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7454,9 +6601,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7464,20 +6608,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->subnetworks->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $subnetworks_scoped_list) {
-    // TODO: Change code below to process each ($name => $subnetworks_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($subnetworks_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $subnetworksScopedList) {
+    // TODO: Change code below to process each (name => subnetworksScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($subnetworksScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -7492,8 +6632,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7501,9 +6643,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7511,18 +6650,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Subnetwork resource to delete.
-$subnetwork = '{MY-SUBNETWORK}';
-
+$subnetwork = '';  // TODO: Update placeholder value.
 
 $response = $service->subnetworks->delete($project, $region, $subnetwork);
 
@@ -7538,8 +6673,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7547,9 +6684,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7557,18 +6691,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the Subnetwork resource to return.
-$subnetwork = '{MY-SUBNETWORK}';
-
+$subnetwork = '';  // TODO: Update placeholder value.
 
 $response = $service->subnetworks->get($project, $region, $subnetwork);
 
@@ -7584,8 +6714,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7593,9 +6725,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7603,19 +6732,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_Subnetwork();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->subnetworks->insert($project, $region, $requestBody);
 
@@ -7631,8 +6755,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7640,9 +6766,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7650,17 +6773,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listSubnetworks` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->subnetworks->listSubnetworks($project, $region, $optParams);
 
@@ -7681,8 +6800,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7690,9 +6811,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7700,15 +6818,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpProxy resource to delete.
-$targetHttpProxy = '{MY-TARGET-HTTP-PROXY}';
-
+$targetHttpProxy = '';  // TODO: Update placeholder value.
 
 $response = $service->targetHttpProxies->delete($project, $targetHttpProxy);
 
@@ -7724,8 +6838,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7733,9 +6849,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7743,15 +6856,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpProxy resource to return.
-$targetHttpProxy = '{MY-TARGET-HTTP-PROXY}';
-
+$targetHttpProxy = '';  // TODO: Update placeholder value.
 
 $response = $service->targetHttpProxies->get($project, $targetHttpProxy);
 
@@ -7767,8 +6876,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7776,9 +6887,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7786,16 +6894,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetHttpProxy();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetHttpProxies->insert($project, $requestBody);
 
@@ -7811,8 +6914,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7820,9 +6925,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7830,20 +6932,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTargetHttpProxies` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetHttpProxies->listTargetHttpProxies($project, $optParams);
 
-  foreach ($response['items'] as $target_http_proxy) {
-    // TODO: Change code below to process each `target_http_proxy` resource:
-    echo '<pre>', var_export($target_http_proxy, true), '</pre>', "\n";
+  foreach ($response['items'] as $targetHttpProxy) {
+    // TODO: Change code below to process each `targetHttpProxy` resource:
+    echo '<pre>', var_export($targetHttpProxy, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -7858,8 +6956,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7867,9 +6967,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7877,19 +6974,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setUrlMap` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpProxy to set a URL map for.
-$targetHttpProxy = '{MY-TARGET-HTTP-PROXY}';
-
+$targetHttpProxy = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_UrlMapReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetHttpProxies->setUrlMap($project, $targetHttpProxy, $requestBody);
 
@@ -7905,8 +6997,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7914,9 +7008,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7924,15 +7015,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpsProxy resource to delete.
-$targetHttpsProxy = '{MY-TARGET-HTTPS-PROXY}';
-
+$targetHttpsProxy = '';  // TODO: Update placeholder value.
 
 $response = $service->targetHttpsProxies->delete($project, $targetHttpsProxy);
 
@@ -7948,8 +7035,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -7957,9 +7046,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -7967,15 +7053,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpsProxy resource to return.
-$targetHttpsProxy = '{MY-TARGET-HTTPS-PROXY}';
-
+$targetHttpsProxy = '';  // TODO: Update placeholder value.
 
 $response = $service->targetHttpsProxies->get($project, $targetHttpsProxy);
 
@@ -7991,8 +7073,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8000,9 +7084,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8010,16 +7091,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetHttpsProxy();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetHttpsProxies->insert($project, $requestBody);
 
@@ -8035,8 +7111,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8044,9 +7122,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8054,20 +7129,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTargetHttpsProxies` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetHttpsProxies->listTargetHttpsProxies($project, $optParams);
 
-  foreach ($response['items'] as $target_https_proxy) {
-    // TODO: Change code below to process each `target_https_proxy` resource:
-    echo '<pre>', var_export($target_https_proxy, true), '</pre>', "\n";
+  foreach ($response['items'] as $targetHttpsProxy) {
+    // TODO: Change code below to process each `targetHttpsProxy` resource:
+    echo '<pre>', var_export($targetHttpsProxy, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -8082,8 +7153,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8091,9 +7164,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8101,19 +7171,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setSslCertificates` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpsProxy resource to set an SslCertificates resource for.
-$targetHttpsProxy = '{MY-TARGET-HTTPS-PROXY}';
-
+$targetHttpsProxy = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetHttpsProxiesSetSslCertificatesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetHttpsProxies->setSslCertificates($project, $targetHttpsProxy, $requestBody);
 
@@ -8129,8 +7194,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8138,9 +7205,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8148,19 +7212,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setUrlMap` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetHttpsProxy resource whose URL map is to be set.
-$targetHttpsProxy = '{MY-TARGET-HTTPS-PROXY}';
-
+$targetHttpsProxy = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_UrlMapReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetHttpsProxies->setUrlMap($project, $targetHttpsProxy, $requestBody);
 
@@ -8176,8 +7235,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8185,9 +7246,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8195,20 +7253,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetInstances->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $target_instances_scoped_list) {
-    // TODO: Change code below to process each ($name => $target_instances_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($target_instances_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $targetInstancesScopedList) {
+    // TODO: Change code below to process each (name => targetInstancesScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($targetInstancesScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -8223,8 +7277,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8232,9 +7288,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8242,18 +7295,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone scoping this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the TargetInstance resource to delete.
-$targetInstance = '{MY-TARGET-INSTANCE}';
-
+$targetInstance = '';  // TODO: Update placeholder value.
 
 $response = $service->targetInstances->delete($project, $zone, $targetInstance);
 
@@ -8269,8 +7318,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8278,9 +7329,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8288,18 +7336,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone scoping this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the TargetInstance resource to return.
-$targetInstance = '{MY-TARGET-INSTANCE}';
-
+$targetInstance = '';  // TODO: Update placeholder value.
 
 $response = $service->targetInstances->get($project, $zone, $targetInstance);
 
@@ -8315,8 +7359,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8324,9 +7370,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8334,19 +7377,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone scoping this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetInstance();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetInstances->insert($project, $zone, $requestBody);
 
@@ -8362,8 +7400,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8371,9 +7411,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8381,23 +7418,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTargetInstances` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone scoping this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetInstances->listTargetInstances($project, $zone, $optParams);
 
-  foreach ($response['items'] as $target_instance) {
-    // TODO: Change code below to process each `target_instance` resource:
-    echo '<pre>', var_export($target_instance, true), '</pre>', "\n";
+  foreach ($response['items'] as $targetInstance) {
+    // TODO: Change code below to process each `targetInstance` resource:
+    echo '<pre>', var_export($targetInstance, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -8412,8 +7445,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8421,9 +7456,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8431,22 +7463,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addHealthCheck` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the target pool to add a health check to.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetPoolsAddHealthCheckRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->addHealthCheck($project, $region, $targetPool, $requestBody);
 
@@ -8462,8 +7489,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8471,9 +7500,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8481,22 +7507,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `addInstance` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the TargetPool resource to add instances to.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetPoolsAddInstanceRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->addInstance($project, $region, $targetPool, $requestBody);
 
@@ -8512,8 +7533,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8521,9 +7544,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8531,20 +7551,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetPools->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $target_pools_scoped_list) {
-    // TODO: Change code below to process each ($name => $target_pools_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($target_pools_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $targetPoolsScopedList) {
+    // TODO: Change code below to process each (name => targetPoolsScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($targetPoolsScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -8559,8 +7575,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8568,9 +7586,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8578,18 +7593,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the TargetPool resource to delete.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
 $response = $service->targetPools->delete($project, $region, $targetPool);
 
@@ -8605,8 +7616,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8614,9 +7627,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8624,18 +7634,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the TargetPool resource to return.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
 $response = $service->targetPools->get($project, $region, $targetPool);
 
@@ -8651,8 +7657,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8660,9 +7668,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8670,22 +7675,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getHealth` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the TargetPool resource to which the queried instance belongs.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_InstanceReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->getHealth($project, $region, $targetPool, $requestBody);
 
@@ -8701,8 +7701,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8710,9 +7712,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8720,19 +7719,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetPool();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->insert($project, $region, $requestBody);
 
@@ -8748,8 +7742,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8757,9 +7753,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8767,23 +7760,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTargetPools` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetPools->listTargetPools($project, $region, $optParams);
 
-  foreach ($response['items'] as $target_pool) {
-    // TODO: Change code below to process each `target_pool` resource:
-    echo '<pre>', var_export($target_pool, true), '</pre>', "\n";
+  foreach ($response['items'] as $targetPool) {
+    // TODO: Change code below to process each `targetPool` resource:
+    echo '<pre>', var_export($targetPool, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -8798,8 +7787,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8807,9 +7798,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8817,22 +7805,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `removeHealthCheck` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the target pool to remove health checks from.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetPoolsRemoveHealthCheckRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->removeHealthCheck($project, $region, $targetPool, $requestBody);
 
@@ -8848,8 +7831,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8857,9 +7842,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8867,22 +7849,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `removeInstance` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the TargetPool resource to remove instances from.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetPoolsRemoveInstanceRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->removeInstance($project, $region, $targetPool, $requestBody);
 
@@ -8898,8 +7875,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8907,9 +7886,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8917,22 +7893,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setBackup` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region scoping this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the TargetPool resource to set a backup pool for.
-$targetPool = '{MY-TARGET-POOL}';
-
+$targetPool = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetReference();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetPools->setBackup($project, $region, $targetPool, $requestBody);
 
@@ -8948,8 +7919,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -8957,9 +7930,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -8967,15 +7937,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetSslProxy resource to delete.
-$targetSslProxy = '{MY-TARGET-SSL-PROXY}';
-
+$targetSslProxy = '';  // TODO: Update placeholder value.
 
 $response = $service->targetSslProxies->delete($project, $targetSslProxy);
 
@@ -8991,8 +7957,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9000,9 +7968,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9010,15 +7975,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetSslProxy resource to return.
-$targetSslProxy = '{MY-TARGET-SSL-PROXY}';
-
+$targetSslProxy = '';  // TODO: Update placeholder value.
 
 $response = $service->targetSslProxies->get($project, $targetSslProxy);
 
@@ -9034,8 +7995,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9043,9 +8006,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9053,16 +8013,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetSslProxy();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetSslProxies->insert($project, $requestBody);
 
@@ -9078,8 +8033,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9087,9 +8044,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9097,20 +8051,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTargetSslProxies` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetSslProxies->listTargetSslProxies($project, $optParams);
 
-  foreach ($response['items'] as $target_ssl_proxy) {
-    // TODO: Change code below to process each `target_ssl_proxy` resource:
-    echo '<pre>', var_export($target_ssl_proxy, true), '</pre>', "\n";
+  foreach ($response['items'] as $targetSslProxy) {
+    // TODO: Change code below to process each `targetSslProxy` resource:
+    echo '<pre>', var_export($targetSslProxy, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -9125,8 +8075,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9134,9 +8086,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9144,19 +8093,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setBackendService` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetSslProxy resource whose BackendService resource is to be set.
-$targetSslProxy = '{MY-TARGET-SSL-PROXY}';
-
+$targetSslProxy = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetSslProxiesSetBackendServiceRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetSslProxies->setBackendService($project, $targetSslProxy, $requestBody);
 
@@ -9172,8 +8116,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9181,9 +8127,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9191,19 +8134,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setProxyHeader` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetSslProxy resource whose ProxyHeader is to be set.
-$targetSslProxy = '{MY-TARGET-SSL-PROXY}';
-
+$targetSslProxy = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetSslProxiesSetProxyHeaderRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetSslProxies->setProxyHeader($project, $targetSslProxy, $requestBody);
 
@@ -9219,8 +8157,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9228,9 +8168,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9238,19 +8175,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setSslCertificates` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the TargetSslProxy resource whose SslCertificate resource is to be set.
-$targetSslProxy = '{MY-TARGET-SSL-PROXY}';
-
+$targetSslProxy = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetSslProxiesSetSslCertificatesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetSslProxies->setSslCertificates($project, $targetSslProxy, $requestBody);
 
@@ -9266,8 +8198,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9275,9 +8209,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9285,20 +8216,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetVpnGateways->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $target_vpn_gateways_scoped_list) {
-    // TODO: Change code below to process each ($name => $target_vpn_gateways_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($target_vpn_gateways_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $targetVpnGatewaysScopedList) {
+    // TODO: Change code below to process each (name => targetVpnGatewaysScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($targetVpnGatewaysScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -9313,8 +8240,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9322,9 +8251,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9332,18 +8258,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the target VPN gateway to delete.
-$targetVpnGateway = '{MY-TARGET-VPN-GATEWAY}';
-
+$targetVpnGateway = '';  // TODO: Update placeholder value.
 
 $response = $service->targetVpnGateways->delete($project, $region, $targetVpnGateway);
 
@@ -9359,8 +8281,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9368,9 +8292,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9378,18 +8299,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the target VPN gateway to return.
-$targetVpnGateway = '{MY-TARGET-VPN-GATEWAY}';
-
+$targetVpnGateway = '';  // TODO: Update placeholder value.
 
 $response = $service->targetVpnGateways->get($project, $region, $targetVpnGateway);
 
@@ -9405,8 +8322,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9414,9 +8333,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9424,19 +8340,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_TargetVpnGateway();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetVpnGateways->insert($project, $region, $requestBody);
 
@@ -9452,8 +8363,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9461,9 +8374,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9471,23 +8381,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTargetVpnGateways` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetVpnGateways->listTargetVpnGateways($project, $region, $optParams);
 
-  foreach ($response['items'] as $target_vpn_gateway) {
-    // TODO: Change code below to process each `target_vpn_gateway` resource:
-    echo '<pre>', var_export($target_vpn_gateway, true), '</pre>', "\n";
+  foreach ($response['items'] as $targetVpnGateway) {
+    // TODO: Change code below to process each `targetVpnGateway` resource:
+    echo '<pre>', var_export($targetVpnGateway, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -9502,8 +8408,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9511,9 +8419,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9521,15 +8426,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the UrlMap resource to delete.
-$urlMap = '{MY-URL-MAP}';
-
+$urlMap = '';  // TODO: Update placeholder value.
 
 $response = $service->urlMaps->delete($project, $urlMap);
 
@@ -9545,8 +8446,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9554,9 +8457,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9564,15 +8464,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the UrlMap resource to return.
-$urlMap = '{MY-URL-MAP}';
-
+$urlMap = '';  // TODO: Update placeholder value.
 
 $response = $service->urlMaps->get($project, $urlMap);
 
@@ -9588,8 +8484,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9597,9 +8495,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9607,16 +8502,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_UrlMap();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->urlMaps->insert($project, $requestBody);
 
@@ -9632,8 +8522,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9641,9 +8533,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9651,19 +8540,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `invalidateCache` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the UrlMap scoping this request.
-$urlMap = '{MY-URL-MAP}';
-
+$urlMap = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_CacheInvalidationRule();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->urlMaps->invalidateCache($project, $urlMap, $requestBody);
 
@@ -9679,8 +8563,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9688,9 +8574,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9698,20 +8581,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listUrlMaps` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->urlMaps->listUrlMaps($project, $optParams);
 
-  foreach ($response['items'] as $url_map) {
-    // TODO: Change code below to process each `url_map` resource:
-    echo '<pre>', var_export($url_map, true), '</pre>', "\n";
+  foreach ($response['items'] as $urlMap) {
+    // TODO: Change code below to process each `urlMap` resource:
+    echo '<pre>', var_export($urlMap, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -9726,8 +8605,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9735,9 +8616,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9745,19 +8623,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the UrlMap resource to update.
-$urlMap = '{MY-URL-MAP}';
-
+$urlMap = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Compute_UrlMap();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->urlMaps->patch($project, $urlMap, $requestBody);
 
@@ -9773,8 +8647,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9782,9 +8658,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9792,19 +8665,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the UrlMap resource to update.
-$urlMap = '{MY-URL-MAP}';
-
+$urlMap = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_UrlMap();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->urlMaps->update($project, $urlMap, $requestBody);
 
@@ -9820,8 +8688,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9829,9 +8699,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9839,19 +8706,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `validate` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the UrlMap resource to be validated as.
-$urlMap = '{MY-URL-MAP}';
-
+$urlMap = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_UrlMapsValidateRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->urlMaps->validate($project, $urlMap, $requestBody);
 
@@ -9867,8 +8729,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9876,9 +8740,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9886,20 +8747,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `aggregatedList` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->vpnTunnels->aggregatedList($project, $optParams);
 
-  foreach ($response['items'] as $name => $vpn_tunnels_scoped_list) {
-    // TODO: Change code below to process each ($name => $vpn_tunnels_scoped_list) element:
-    echo '<pre>', $name, ' => ', var_export($vpn_tunnels_scoped_list, true), '</pre>', "\n";
+  foreach ($response['items'] as $name => $vpnTunnelsScopedList) {
+    // TODO: Change code below to process each (name => vpnTunnelsScopedList) element:
+    echo '<pre>', $name, ' => ', var_export($vpnTunnelsScopedList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -9914,8 +8771,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9923,9 +8782,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9933,18 +8789,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the VpnTunnel resource to delete.
-$vpnTunnel = '{MY-VPN-TUNNEL}';
-
+$vpnTunnel = '';  // TODO: Update placeholder value.
 
 $response = $service->vpnTunnels->delete($project, $region, $vpnTunnel);
 
@@ -9960,8 +8812,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -9969,9 +8823,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -9979,18 +8830,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
 // Name of the VpnTunnel resource to return.
-$vpnTunnel = '{MY-VPN-TUNNEL}';
-
+$vpnTunnel = '';  // TODO: Update placeholder value.
 
 $response = $service->vpnTunnels->get($project, $region, $vpnTunnel);
 
@@ -10006,8 +8853,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10015,9 +8864,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10025,19 +8871,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
-
+$region = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Compute_VpnTunnel();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->vpnTunnels->insert($project, $region, $requestBody);
 
@@ -10053,8 +8894,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10062,9 +8905,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10072,23 +8912,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listVpnTunnels` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the region for this request.
-$region = '{MY-REGION}';
+$region = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->vpnTunnels->listVpnTunnels($project, $region, $optParams);
 
-  foreach ($response['items'] as $vpn_tunnel) {
-    // TODO: Change code below to process each `vpn_tunnel` resource:
-    echo '<pre>', var_export($vpn_tunnel, true), '</pre>', "\n";
+  foreach ($response['items'] as $vpnTunnel) {
+    // TODO: Change code below to process each `vpnTunnel` resource:
+    echo '<pre>', var_export($vpnTunnel, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -10103,8 +8939,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10112,9 +8950,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10122,18 +8957,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to delete.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $service->zoneOperations->delete($project, $zone, $operation);
 ?>
@@ -10146,8 +8977,10 @@ $service->zoneOperations->delete($project, $zone, $operation);
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10155,9 +8988,6 @@ $service->zoneOperations->delete($project, $zone, $operation);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10165,18 +8995,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for this request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the Operations resource to return.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->zoneOperations->get($project, $zone, $operation);
 
@@ -10192,8 +9018,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10201,9 +9029,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10211,17 +9036,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listZoneOperations` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone for request.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->zoneOperations->listZoneOperations($project, $zone, $optParams);
 
@@ -10242,8 +9063,10 @@ do {
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10251,9 +9074,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10261,15 +9081,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone resource to return.
-$zone = '{MY-ZONE}';  // ex: 'us-central1-f'
-
+$zone = '';  // TODO: Update placeholder value.
 
 $response = $service->zones->get($project, $zone);
 
@@ -10285,8 +9101,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/compute
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -10294,9 +9112,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ComputeSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -10304,14 +9119,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Compute($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listZones` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->zones->listZones($project, $optParams);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_container.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_container.v1.json.baseline
index c0a4ddc96f..8b87d57cac 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_container.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_container.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,21 +26,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `create` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Container_CreateClusterRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_zones_clusters->create($projectId, $zone, $requestBody);
 
@@ -57,8 +51,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -66,9 +62,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -76,20 +69,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster to delete.
-$clusterId = '{MY-CLUSTER-ID}';
-
+$clusterId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_clusters->delete($projectId, $zone, $clusterId);
 
@@ -105,8 +94,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -114,9 +105,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -124,20 +112,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster to retrieve.
-$clusterId = '{MY-CLUSTER-ID}';
-
+$clusterId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_clusters->get($projectId, $zone, $clusterId);
 
@@ -153,8 +137,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -162,9 +148,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -172,17 +155,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listProjectsZonesClusters` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides, or "-" for all zones.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_clusters->listProjectsZonesClusters($projectId, $zone);
 
@@ -198,8 +177,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -207,9 +188,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -217,24 +195,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `create` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://developers.google.com/console/help/new/#projectnumber).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster.
-$clusterId = '{MY-CLUSTER-ID}';
-
+$clusterId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Container_CreateNodePoolRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_zones_clusters_nodePools->create($projectId, $zone, $clusterId, $requestBody);
 
@@ -250,8 +223,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -259,9 +234,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -269,23 +241,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://developers.google.com/console/help/new/#projectnumber).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster.
-$clusterId = '{MY-CLUSTER-ID}';
+$clusterId = '';  // TODO: Update placeholder value.
 
 // The name of the node pool to delete.
-$nodePoolId = '{MY-NODE-POOL-ID}';
-
+$nodePoolId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_clusters_nodePools->delete($projectId, $zone, $clusterId, $nodePoolId);
 
@@ -301,8 +269,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -310,9 +280,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -320,23 +287,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://developers.google.com/console/help/new/#projectnumber).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster.
-$clusterId = '{MY-CLUSTER-ID}';
+$clusterId = '';  // TODO: Update placeholder value.
 
 // The name of the node pool.
-$nodePoolId = '{MY-NODE-POOL-ID}';
-
+$nodePoolId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_clusters_nodePools->get($projectId, $zone, $clusterId, $nodePoolId);
 
@@ -352,8 +315,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -361,9 +326,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -371,20 +333,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listProjectsZonesClustersNodePools` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://developers.google.com/console/help/new/#projectnumber).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster.
-$clusterId = '{MY-CLUSTER-ID}';
-
+$clusterId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_clusters_nodePools->listProjectsZonesClustersNodePools($projectId, $zone, $clusterId);
 
@@ -400,8 +358,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -409,9 +369,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -419,24 +376,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the cluster to upgrade.
-$clusterId = '{MY-CLUSTER-ID}';
-
+$clusterId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Container_UpdateClusterRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_zones_clusters->update($projectId, $zone, $clusterId, $requestBody);
 
@@ -452,8 +404,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -461,9 +415,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -471,17 +422,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getServerconfig` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) to return operations
 // for.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones->getServerconfig($projectId, $zone);
 
@@ -497,8 +444,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -506,9 +455,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -516,20 +462,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) in which the cluster
 // resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The server-assigned `name` of the operation.
-$operationId = '{MY-OPERATION-ID}';
-
+$operationId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_operations->get($projectId, $zone, $operationId);
 
@@ -545,8 +487,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/container
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -554,9 +498,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ContainerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -564,17 +505,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Container($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listProjectsZonesOperations` method:
-
 // The Google Developers Console [project ID or project number]
 // (https://support.google.com/cloud/answer/6158840).
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The name of the Google Compute Engine [zone](/compute/docs/zones#available) to return operations
 // for, or `-` for all zones.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_zones_operations->listProjectsZonesOperations($projectId, $zone);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dataflow.v1b3.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dataflow.v1b3.json.baseline
index 1d7e3cb873..dfddb55d12 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dataflow.v1b3.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dataflow.v1b3.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,16 +26,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // The project which owns the job.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_Job();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_jobs->create($projectId, $requestBody);
 
@@ -52,8 +46,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -61,9 +57,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -71,19 +64,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getConfig` method:
-
 // The project id.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The job id.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_GetDebugConfigRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_jobs_debug->getConfig($projectId, $jobId, $requestBody);
 
@@ -99,8 +87,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -108,9 +98,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -118,19 +105,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `sendCapture` method:
-
 // The project id.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The job id.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_SendDebugCaptureRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_jobs_debug->sendCapture($projectId, $jobId, $requestBody);
 
@@ -146,8 +128,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -155,9 +139,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -165,15 +146,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project which owns the job.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Identifies a single job.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_jobs->get($projectId, $jobId);
 
@@ -189,8 +166,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -198,9 +177,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -208,15 +184,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getMetrics` method:
-
 // A project id.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The job to get messages for.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
 $response = $service->projects_jobs->getMetrics($projectId, $jobId);
 
@@ -232,8 +204,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -241,9 +215,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -251,14 +222,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsJobs` method:
-
 // The project which owns the jobs.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_jobs->listProjectsJobs($projectId, $optParams);
 
@@ -279,8 +246,10 @@ do {
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -288,9 +257,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -298,23 +264,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listProjectsJobsMessages` method:
-
 // A project id.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The job to get messages about.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_jobs_messages->listProjectsJobsMessages($projectId, $jobId, $optParams);
 
-  foreach ($response['jobMessages'] as $job_message) {
-    // TODO: Change code below to process each `job_message` resource:
-    echo '<pre>', var_export($job_message, true), '</pre>', "\n";
+  foreach ($response['jobMessages'] as $jobMessage) {
+    // TODO: Change code below to process each `jobMessage` resource:
+    echo '<pre>', var_export($jobMessage, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -329,8 +291,10 @@ do {
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -338,9 +302,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -348,19 +309,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The project which owns the job.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Identifies a single job.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_Job();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_jobs->update($projectId, $jobId, $requestBody);
 
@@ -376,8 +332,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -385,9 +343,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -395,19 +350,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `lease` method:
-
 // Identifies the project this worker belongs to.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // Identifies the workflow job this worker belongs to.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_LeaseWorkItemRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_jobs_workItems->lease($projectId, $jobId, $requestBody);
 
@@ -423,8 +373,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -432,9 +384,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -442,19 +391,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `reportStatus` method:
-
 // The project which owns the WorkItem's job.
-$projectId = '{MY-PROJECT-ID}';
+$projectId = '';  // TODO: Update placeholder value.
 
 // The job which the WorkItem is part of.
-$jobId = '{MY-JOB-ID}';
-
+$jobId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_ReportWorkItemStatusRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_jobs_workItems->reportStatus($projectId, $jobId, $requestBody);
 
@@ -470,8 +414,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -479,9 +425,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -489,16 +432,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // The project which owns the job.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_CreateJobFromTemplateRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_templates->create($projectId, $requestBody);
 
@@ -514,8 +452,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dataflow
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -523,9 +463,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DataflowSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -533,16 +470,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dataflow($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `workerMessages` method:
-
 // The project to send the WorkerMessages to.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dataflow_SendWorkerMessagesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->workerMessages($projectId, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_datastore.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_datastore.v1.json.baseline
index ced38c5966..9a6d380e50 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_datastore.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_datastore.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/datastore
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DatastoreSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,16 +26,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Datastore($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `allocateIds` method:
-
 // The ID of the project against which to make the request.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Datastore_AllocateIdsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->allocateIds($projectId, $requestBody);
 
@@ -52,8 +46,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/datastore
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -61,9 +57,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DatastoreSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -71,16 +64,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Datastore($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `beginTransaction` method:
-
 // The ID of the project against which to make the request.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Datastore_BeginTransactionRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->beginTransaction($projectId, $requestBody);
 
@@ -96,8 +84,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/datastore
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -105,9 +95,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DatastoreSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -115,16 +102,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Datastore($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `commit` method:
-
 // The ID of the project against which to make the request.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Datastore_CommitRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->commit($projectId, $requestBody);
 
@@ -140,8 +122,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/datastore
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -149,9 +133,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DatastoreSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -159,16 +140,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Datastore($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `lookup` method:
-
 // The ID of the project against which to make the request.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Datastore_LookupRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->lookup($projectId, $requestBody);
 
@@ -184,8 +160,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/datastore
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -193,9 +171,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DatastoreSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -203,16 +178,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Datastore($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `rollback` method:
-
 // The ID of the project against which to make the request.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Datastore_RollbackRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->rollback($projectId, $requestBody);
 
@@ -228,8 +198,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/datastore
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -237,9 +209,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DatastoreSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -247,16 +216,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Datastore($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `runQuery` method:
-
 // The ID of the project against which to make the request.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Datastore_RunQueryRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects->runQuery($projectId, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_deploymentmanager.v2.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_deploymentmanager.v2.json.baseline
index 11bd290e15..e5774e835f 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_deploymentmanager.v2.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_deploymentmanager.v2.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,19 +26,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `cancelPreview` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_DeploymentManager_DeploymentsCancelPreviewRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->deployments->cancelPreview($project, $deployment, $requestBody);
 
@@ -55,8 +49,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -64,9 +60,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -74,15 +67,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
 $response = $service->deployments->delete($project, $deployment);
 
@@ -98,8 +87,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -107,9 +98,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -117,15 +105,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
 $response = $service->deployments->get($project, $deployment);
 
@@ -141,8 +125,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -150,9 +136,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -160,15 +143,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `getIamPolicy` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the resource for this request.
-$resource = '{MY-RESOURCE}';
-
+$resource = '';  // TODO: Update placeholder value.
 
 $response = $service->deployments->getIamPolicy($project, $resource);
 
@@ -184,8 +163,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -193,9 +174,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -203,16 +181,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_DeploymentManager_Deployment();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->deployments->insert($project, $requestBody);
 
@@ -228,8 +201,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -237,9 +212,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -247,14 +219,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDeployments` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->deployments->listDeployments($project, $optParams);
 
@@ -275,8 +243,10 @@ do {
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -284,9 +254,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -294,19 +261,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_DeploymentManager_Deployment();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->deployments->patch($project, $deployment, $requestBody);
 
@@ -322,8 +285,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -331,9 +296,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -341,19 +303,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `setIamPolicy` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the resource for this request.
-$resource = '{MY-RESOURCE}';
-
+$resource = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_DeploymentManager_Policy();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->deployments->setIamPolicy($project, $resource, $requestBody);
 
@@ -369,8 +326,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -378,9 +337,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -388,19 +344,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `stop` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_DeploymentManager_DeploymentsStopRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->deployments->stop($project, $deployment, $requestBody);
 
@@ -416,8 +367,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -425,9 +378,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -435,19 +385,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `testIamPermissions` method:
-
 // Project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the resource for this request.
-$resource = '{MY-RESOURCE}';
-
+$resource = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_DeploymentManager_TestPermissionsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->deployments->testIamPermissions($project, $resource, $requestBody);
 
@@ -463,8 +408,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -472,9 +419,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -482,19 +426,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_DeploymentManager_Deployment();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->deployments->update($project, $deployment, $requestBody);
 
@@ -510,8 +449,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -519,9 +460,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -529,18 +467,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
+$deployment = '';  // TODO: Update placeholder value.
 
 // The name of the manifest for this request.
-$manifest = '{MY-MANIFEST}';
-
+$manifest = '';  // TODO: Update placeholder value.
 
 $response = $service->manifests->get($project, $deployment, $manifest);
 
@@ -556,8 +490,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -565,9 +501,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -575,17 +508,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listManifests` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->manifests->listManifests($project, $deployment, $optParams);
 
@@ -606,8 +535,10 @@ do {
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -615,9 +546,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -625,15 +553,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the operation for this request.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->operations->get($project, $operation);
 
@@ -649,8 +573,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -658,9 +584,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -668,14 +591,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listOperations` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->operations->listOperations($project, $optParams);
 
@@ -696,8 +615,10 @@ do {
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -705,9 +626,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -715,18 +633,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
+$deployment = '';  // TODO: Update placeholder value.
 
 // The name of the resource for this request.
-$resource = '{MY-RESOURCE}';
-
+$resource = '';  // TODO: Update placeholder value.
 
 $response = $service->resources->get($project, $deployment, $resource);
 
@@ -742,8 +656,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -751,9 +667,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -761,17 +674,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listResources` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the deployment for this request.
-$deployment = '{MY-DEPLOYMENT}';
-
+$deployment = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->resources->listResources($project, $deployment, $optParams);
 
@@ -792,8 +701,10 @@ do {
  *    https://console.developers.google.com/apis/api/deploymentmanager
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -801,9 +712,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DeploymentManagerSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -811,14 +719,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_DeploymentManager($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTypes` method:
-
 // The project ID for this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->types->listTypes($project, $optParams);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dfareporting.v2.6.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dfareporting.v2.6.json.baseline
index 3f51f5b475..7a5b546a90 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dfareporting.v2.6.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dfareporting.v2.6.json.baseline
@@ -17,15 +17,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Account ID.
-$summaryAccountId = '0';
-
+$summaryAccountId = '0';  // TODO: Update placeholder value.
 
 $response = $service->accountActiveAdSummaries->get($profileId, $summaryAccountId);
 
@@ -33,10 +29,10 @@ $response = $service->accountActiveAdSummaries->get($profileId, $summaryAccountI
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -59,15 +55,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Account permission group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->accountPermissionGroups->get($profileId, $id);
 
@@ -75,10 +67,10 @@ $response = $service->accountPermissionGroups->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -101,12 +93,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAccountPermissionGroups` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->accountPermissionGroups->listAccountPermissionGroups($profileId);
 
@@ -114,10 +102,10 @@ $response = $service->accountPermissionGroups->listAccountPermissionGroups($prof
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAccountPermissionGroups` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -140,15 +128,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Account permission ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->accountPermissions->get($profileId, $id);
 
@@ -156,10 +140,10 @@ $response = $service->accountPermissions->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -182,12 +166,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAccountPermissions` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->accountPermissions->listAccountPermissions($profileId);
 
@@ -195,10 +175,10 @@ $response = $service->accountPermissions->listAccountPermissions($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAccountPermissions` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -221,15 +201,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User profile ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->accountUserProfiles->get($profileId, $id);
 
@@ -237,10 +213,10 @@ $response = $service->accountUserProfiles->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -263,16 +239,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_AccountUserProfile();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->accountUserProfiles->insert($profileId, $requestBody);
 
@@ -280,10 +251,10 @@ $response = $service->accountUserProfiles->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -306,30 +277,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAccountUserProfiles` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->accountUserProfiles->listAccountUserProfiles($profileId, $optParams);
 
-  foreach ($response['accountUserProfiles'] as $account_user_profile) {
-    // TODO: Change code below to process each `account_user_profile` resource:
-    echo '<pre>', var_export($account_user_profile, true), '</pre>', "\n";
+  foreach ($response['accountUserProfiles'] as $accountUserProfile) {
+    // TODO: Change code below to process each `accountUserProfile` resource:
+    echo '<pre>', var_export($accountUserProfile, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAccountUserProfiles` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -352,19 +319,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User profile ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_AccountUserProfile();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->accountUserProfiles->patch($profileId, $id, $requestBody);
 
@@ -372,10 +335,10 @@ $response = $service->accountUserProfiles->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -398,16 +361,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_AccountUserProfile();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->accountUserProfiles->update($profileId, $requestBody);
 
@@ -415,10 +373,10 @@ $response = $service->accountUserProfiles->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -441,15 +399,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Account ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->accounts->get($profileId, $id);
 
@@ -457,10 +411,10 @@ $response = $service->accounts->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -483,14 +437,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAccounts` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->accounts->listAccounts($profileId, $optParams);
 
@@ -503,10 +453,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAccounts` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -529,19 +479,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Account ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Account();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->accounts->patch($profileId, $id, $requestBody);
 
@@ -549,10 +495,10 @@ $response = $service->accounts->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -575,16 +521,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Account();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->accounts->update($profileId, $requestBody);
 
@@ -592,10 +533,10 @@ $response = $service->accounts->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -618,15 +559,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Ad ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->ads->get($profileId, $id);
 
@@ -634,10 +571,10 @@ $response = $service->ads->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -660,16 +597,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Ad();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->ads->insert($profileId, $requestBody);
 
@@ -677,10 +609,10 @@ $response = $service->ads->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -703,14 +635,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAds` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->ads->listAds($profileId, $optParams);
 
@@ -723,10 +651,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAds` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -749,19 +677,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Ad ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Ad();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->ads->patch($profileId, $id, $requestBody);
 
@@ -769,10 +693,10 @@ $response = $service->ads->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -795,16 +719,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Ad();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->ads->update($profileId, $requestBody);
 
@@ -812,10 +731,10 @@ $response = $service->ads->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -838,23 +757,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Advertiser group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->advertiserGroups->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -877,15 +792,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Advertiser group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->advertiserGroups->get($profileId, $id);
 
@@ -893,10 +804,10 @@ $response = $service->advertiserGroups->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -919,16 +830,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_AdvertiserGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->advertiserGroups->insert($profileId, $requestBody);
 
@@ -936,10 +842,10 @@ $response = $service->advertiserGroups->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -962,30 +868,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAdvertiserGroups` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->advertiserGroups->listAdvertiserGroups($profileId, $optParams);
 
-  foreach ($response['advertiserGroups'] as $advertiser_group) {
-    // TODO: Change code below to process each `advertiser_group` resource:
-    echo '<pre>', var_export($advertiser_group, true), '</pre>', "\n";
+  foreach ($response['advertiserGroups'] as $advertiserGroup) {
+    // TODO: Change code below to process each `advertiserGroup` resource:
+    echo '<pre>', var_export($advertiserGroup, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAdvertiserGroups` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1008,19 +910,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Advertiser group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_AdvertiserGroup();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->advertiserGroups->patch($profileId, $id, $requestBody);
 
@@ -1028,10 +926,10 @@ $response = $service->advertiserGroups->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1054,16 +952,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_AdvertiserGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->advertiserGroups->update($profileId, $requestBody);
 
@@ -1071,10 +964,10 @@ $response = $service->advertiserGroups->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1097,15 +990,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Advertiser ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->advertisers->get($profileId, $id);
 
@@ -1113,10 +1002,10 @@ $response = $service->advertisers->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1139,16 +1028,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Advertiser();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->advertisers->insert($profileId, $requestBody);
 
@@ -1156,10 +1040,10 @@ $response = $service->advertisers->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1182,14 +1066,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listAdvertisers` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->advertisers->listAdvertisers($profileId, $optParams);
 
@@ -1202,10 +1082,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listAdvertisers` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1228,19 +1108,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Advertiser ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Advertiser();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->advertisers->patch($profileId, $id, $requestBody);
 
@@ -1248,10 +1124,10 @@ $response = $service->advertisers->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1274,16 +1150,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Advertiser();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->advertisers->update($profileId, $requestBody);
 
@@ -1291,10 +1162,10 @@ $response = $service->advertisers->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1317,12 +1188,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listBrowsers` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->browsers->listBrowsers($profileId);
 
@@ -1330,10 +1197,10 @@ $response = $service->browsers->listBrowsers($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listBrowsers` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1356,19 +1223,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Campaign ID in this association.
-$campaignId = '0';
-
+$campaignId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CampaignCreativeAssociation();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->campaignCreativeAssociations->insert($profileId, $campaignId, $requestBody);
 
@@ -1376,10 +1238,10 @@ $response = $service->campaignCreativeAssociations->insert($profileId, $campaign
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1402,33 +1264,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listCampaignCreativeAssociations` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Campaign ID in this association.
-$campaignId = '0';
+$campaignId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->campaignCreativeAssociations->listCampaignCreativeAssociations($profileId, $campaignId, $optParams);
 
-  foreach ($response['campaignCreativeAssociations'] as $campaign_creative_association) {
-    // TODO: Change code below to process each `campaign_creative_association` resource:
-    echo '<pre>', var_export($campaign_creative_association, true), '</pre>', "\n";
+  foreach ($response['campaignCreativeAssociations'] as $campaignCreativeAssociation) {
+    // TODO: Change code below to process each `campaignCreativeAssociation` resource:
+    echo '<pre>', var_export($campaignCreativeAssociation, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCampaignCreativeAssociations` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1451,15 +1309,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Campaign ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->campaigns->get($profileId, $id);
 
@@ -1467,10 +1321,10 @@ $response = $service->campaigns->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1493,22 +1347,17 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Default landing page name for this new campaign. Must be less than 256 characters long.
-$defaultLandingPageName = '{MY-DEFAULT-LANDING-PAGE-NAME}';
+$defaultLandingPageName = '';  // TODO: Update placeholder value.
 
 // Default landing page URL for this new campaign.
-$defaultLandingPageUrl = '{MY-DEFAULT-LANDING-PAGE-URL}';
-
+$defaultLandingPageUrl = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Campaign();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->campaigns->insert($profileId, $defaultLandingPageName, $defaultLandingPageUrl, $requestBody);
 
@@ -1516,10 +1365,10 @@ $response = $service->campaigns->insert($profileId, $defaultLandingPageName, $de
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1542,14 +1391,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listCampaigns` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->campaigns->listCampaigns($profileId, $optParams);
 
@@ -1562,10 +1407,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCampaigns` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1588,19 +1433,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Campaign ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Campaign();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->campaigns->patch($profileId, $id, $requestBody);
 
@@ -1608,10 +1449,10 @@ $response = $service->campaigns->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1634,16 +1475,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Campaign();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->campaigns->update($profileId, $requestBody);
 
@@ -1651,10 +1487,10 @@ $response = $service->campaigns->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1677,15 +1513,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Change log ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->changeLogs->get($profileId, $id);
 
@@ -1693,10 +1525,10 @@ $response = $service->changeLogs->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1719,30 +1551,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listChangeLogs` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->changeLogs->listChangeLogs($profileId, $optParams);
 
-  foreach ($response['changeLogs'] as $change_log) {
-    // TODO: Change code below to process each `change_log` resource:
-    echo '<pre>', var_export($change_log, true), '</pre>', "\n";
+  foreach ($response['changeLogs'] as $changeLog) {
+    // TODO: Change code below to process each `changeLog` resource:
+    echo '<pre>', var_export($changeLog, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listChangeLogs` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1765,12 +1593,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listCities` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->cities->listCities($profileId);
 
@@ -1778,10 +1602,10 @@ $response = $service->cities->listCities($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCities` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1804,15 +1628,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Connection type ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->connectionTypes->get($profileId, $id);
 
@@ -1820,10 +1640,10 @@ $response = $service->connectionTypes->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1846,12 +1666,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listConnectionTypes` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->connectionTypes->listConnectionTypes($profileId);
 
@@ -1859,10 +1675,10 @@ $response = $service->connectionTypes->listConnectionTypes($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listConnectionTypes` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1885,23 +1701,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Content category ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->contentCategories->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1924,15 +1736,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Content category ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->contentCategories->get($profileId, $id);
 
@@ -1940,10 +1748,10 @@ $response = $service->contentCategories->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -1966,16 +1774,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_ContentCategory();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->contentCategories->insert($profileId, $requestBody);
 
@@ -1983,10 +1786,10 @@ $response = $service->contentCategories->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2009,30 +1812,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listContentCategories` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->contentCategories->listContentCategories($profileId, $optParams);
 
-  foreach ($response['contentCategories'] as $content_category) {
-    // TODO: Change code below to process each `content_category` resource:
-    echo '<pre>', var_export($content_category, true), '</pre>', "\n";
+  foreach ($response['contentCategories'] as $contentCategory) {
+    // TODO: Change code below to process each `contentCategory` resource:
+    echo '<pre>', var_export($contentCategory, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listContentCategories` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2055,19 +1854,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Content category ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_ContentCategory();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->contentCategories->patch($profileId, $id, $requestBody);
 
@@ -2075,10 +1870,10 @@ $response = $service->contentCategories->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2101,16 +1896,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_ContentCategory();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->contentCategories->update($profileId, $requestBody);
 
@@ -2118,10 +1908,10 @@ $response = $service->contentCategories->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2144,16 +1934,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `batchinsert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_ConversionsBatchInsertRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->conversions->batchinsert($profileId, $requestBody);
 
@@ -2161,10 +1946,10 @@ $response = $service->conversions->batchinsert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `batchinsert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/ddmconversions
   return null;
 }
@@ -2187,15 +1972,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Country DART ID.
-$dartId = '0';
-
+$dartId = '0';  // TODO: Update placeholder value.
 
 $response = $service->countries->get($profileId, $dartId);
 
@@ -2203,10 +1984,10 @@ $response = $service->countries->get($profileId, $dartId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2229,12 +2010,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listCountries` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->countries->listCountries($profileId);
 
@@ -2242,10 +2019,10 @@ $response = $service->countries->listCountries($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCountries` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2268,34 +2045,28 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Advertiser ID of this creative. This is a required field.
-$advertiserId = '0';
-
+$advertiserId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeAssetMetadata();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 // TODO: Add desired media content for upload. For more information, see:
 // https://developers.google.com/api-client-library/php/guide/media_upload
 
-
 $response = $service->creativeAssets->insert($profileId, $advertiserId, $requestBody);
 
 // TODO: Change code below to process the `response` object:
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2318,26 +2089,22 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative field ID for this creative field value.
-$creativeFieldId = '0';
+$creativeFieldId = '0';  // TODO: Update placeholder value.
 
 // Creative Field Value ID
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->creativeFieldValues->delete($profileId, $creativeFieldId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2360,18 +2127,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative field ID for this creative field value.
-$creativeFieldId = '0';
+$creativeFieldId = '0';  // TODO: Update placeholder value.
 
 // Creative Field Value ID
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->creativeFieldValues->get($profileId, $creativeFieldId, $id);
 
@@ -2379,10 +2142,10 @@ $response = $service->creativeFieldValues->get($profileId, $creativeFieldId, $id
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2405,19 +2168,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative field ID for this creative field value.
-$creativeFieldId = '0';
-
+$creativeFieldId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeFieldValue();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creativeFieldValues->insert($profileId, $creativeFieldId, $requestBody);
 
@@ -2425,10 +2183,10 @@ $response = $service->creativeFieldValues->insert($profileId, $creativeFieldId,
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2451,33 +2209,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listCreativeFieldValues` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative field ID for this creative field value.
-$creativeFieldId = '0';
-
+$creativeFieldId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->creativeFieldValues->listCreativeFieldValues($profileId, $creativeFieldId, $optParams);
 
-  foreach ($response['creativeFieldValues'] as $creative_field_value) {
-    // TODO: Change code below to process each `creative_field_value` resource:
-    echo '<pre>', var_export($creative_field_value, true), '</pre>', "\n";
+  foreach ($response['creativeFieldValues'] as $creativeFieldValue) {
+    // TODO: Change code below to process each `creativeFieldValue` resource:
+    echo '<pre>', var_export($creativeFieldValue, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCreativeFieldValues` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2500,22 +2254,18 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative field ID for this creative field value.
-$creativeFieldId = '0';
+$creativeFieldId = '0';  // TODO: Update placeholder value.
 
 // Creative Field Value ID
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_CreativeFieldValue();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->creativeFieldValues->patch($profileId, $creativeFieldId, $id, $requestBody);
 
@@ -2523,10 +2273,10 @@ $response = $service->creativeFieldValues->patch($profileId, $creativeFieldId, $
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2549,19 +2299,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative field ID for this creative field value.
-$creativeFieldId = '0';
-
+$creativeFieldId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeFieldValue();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creativeFieldValues->update($profileId, $creativeFieldId, $requestBody);
 
@@ -2569,10 +2314,10 @@ $response = $service->creativeFieldValues->update($profileId, $creativeFieldId,
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2595,23 +2340,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative Field ID
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->creativeFields->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2634,15 +2375,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative Field ID
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->creativeFields->get($profileId, $id);
 
@@ -2650,10 +2387,10 @@ $response = $service->creativeFields->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2676,16 +2413,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeField();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creativeFields->insert($profileId, $requestBody);
 
@@ -2693,10 +2425,10 @@ $response = $service->creativeFields->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2719,30 +2451,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listCreativeFields` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->creativeFields->listCreativeFields($profileId, $optParams);
 
-  foreach ($response['creativeFields'] as $creative_field) {
-    // TODO: Change code below to process each `creative_field` resource:
-    echo '<pre>', var_export($creative_field, true), '</pre>', "\n";
+  foreach ($response['creativeFields'] as $creativeField) {
+    // TODO: Change code below to process each `creativeField` resource:
+    echo '<pre>', var_export($creativeField, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCreativeFields` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2765,19 +2493,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative Field ID
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_CreativeField();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->creativeFields->patch($profileId, $id, $requestBody);
 
@@ -2785,10 +2509,10 @@ $response = $service->creativeFields->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2811,16 +2535,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeField();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creativeFields->update($profileId, $requestBody);
 
@@ -2828,10 +2547,10 @@ $response = $service->creativeFields->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2854,15 +2573,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->creativeGroups->get($profileId, $id);
 
@@ -2870,10 +2585,10 @@ $response = $service->creativeGroups->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2896,16 +2611,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creativeGroups->insert($profileId, $requestBody);
 
@@ -2913,10 +2623,10 @@ $response = $service->creativeGroups->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2939,30 +2649,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listCreativeGroups` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->creativeGroups->listCreativeGroups($profileId, $optParams);
 
-  foreach ($response['creativeGroups'] as $creative_group) {
-    // TODO: Change code below to process each `creative_group` resource:
-    echo '<pre>', var_export($creative_group, true), '</pre>', "\n";
+  foreach ($response['creativeGroups'] as $creativeGroup) {
+    // TODO: Change code below to process each `creativeGroup` resource:
+    echo '<pre>', var_export($creativeGroup, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCreativeGroups` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -2985,19 +2691,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_CreativeGroup();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->creativeGroups->patch($profileId, $id, $requestBody);
 
@@ -3005,10 +2707,10 @@ $response = $service->creativeGroups->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3031,16 +2733,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_CreativeGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creativeGroups->update($profileId, $requestBody);
 
@@ -3048,10 +2745,10 @@ $response = $service->creativeGroups->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3074,15 +2771,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->creatives->get($profileId, $id);
 
@@ -3090,10 +2783,10 @@ $response = $service->creatives->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3116,16 +2809,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Creative();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creatives->insert($profileId, $requestBody);
 
@@ -3133,10 +2821,10 @@ $response = $service->creatives->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3159,14 +2847,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listCreatives` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->creatives->listCreatives($profileId, $optParams);
 
@@ -3179,10 +2863,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listCreatives` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3205,19 +2889,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Creative ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Creative();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->creatives->patch($profileId, $id, $requestBody);
 
@@ -3225,10 +2905,10 @@ $response = $service->creatives->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3251,16 +2931,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Creative();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->creatives->update($profileId, $requestBody);
 
@@ -3268,10 +2943,10 @@ $response = $service->creatives->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3294,34 +2969,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `query` method:
-
 // The DFA user profile ID.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_DimensionValueRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->dimensionValues->query($profileId, $requestBody, $optParams);
 
-  foreach ($response['items'] as $dimension_value) {
-    // TODO: Change code below to process each `dimension_value` resource:
-    echo '<pre>', var_export($dimension_value, true), '</pre>', "\n";
+  foreach ($response['items'] as $dimensionValue) {
+    // TODO: Change code below to process each `dimensionValue` resource:
+    echo '<pre>', var_export($dimensionValue, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `query` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -3344,15 +3014,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Directory site contact ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->directorySiteContacts->get($profileId, $id);
 
@@ -3360,10 +3026,10 @@ $response = $service->directorySiteContacts->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3386,30 +3052,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDirectorySiteContacts` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->directorySiteContacts->listDirectorySiteContacts($profileId, $optParams);
 
-  foreach ($response['directorySiteContacts'] as $directory_site_contact) {
-    // TODO: Change code below to process each `directory_site_contact` resource:
-    echo '<pre>', var_export($directory_site_contact, true), '</pre>', "\n";
+  foreach ($response['directorySiteContacts'] as $directorySiteContact) {
+    // TODO: Change code below to process each `directorySiteContact` resource:
+    echo '<pre>', var_export($directorySiteContact, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listDirectorySiteContacts` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3432,15 +3094,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Directory site ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->directorySites->get($profileId, $id);
 
@@ -3448,10 +3106,10 @@ $response = $service->directorySites->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3474,16 +3132,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_DirectorySite();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->directorySites->insert($profileId, $requestBody);
 
@@ -3491,10 +3144,10 @@ $response = $service->directorySites->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3517,30 +3170,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDirectorySites` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->directorySites->listDirectorySites($profileId, $optParams);
 
-  foreach ($response['directorySites'] as $directory_site) {
-    // TODO: Change code below to process each `directory_site` resource:
-    echo '<pre>', var_export($directory_site, true), '</pre>', "\n";
+  foreach ($response['directorySites'] as $directorySite) {
+    // TODO: Change code below to process each `directorySite` resource:
+    echo '<pre>', var_export($directorySite, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listDirectorySites` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3563,30 +3212,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // ID of the object of this dynamic targeting key. This is a required field.
-$objectId = '0';
+$objectId = '0';  // TODO: Update placeholder value.
 
 // Name of this dynamic targeting key. This is a required field. Must be less than 256 characters long
 // and cannot contain commas. All characters are converted to lowercase.
-$name = '{MY-NAME}';
+$name = '';  // TODO: Update placeholder value.
 
 // Type of the object of this dynamic targeting key. This is a required field.
-$objectType = '{MY-OBJECT-TYPE}';
-
+$objectType = '';  // TODO: Update placeholder value.
 
 $service->dynamicTargetingKeys->delete($profileId, $objectId, $name, $objectType);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3609,16 +3254,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_DynamicTargetingKey();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->dynamicTargetingKeys->insert($profileId, $requestBody);
 
@@ -3626,10 +3266,10 @@ $response = $service->dynamicTargetingKeys->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3652,12 +3292,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDynamicTargetingKeys` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->dynamicTargetingKeys->listDynamicTargetingKeys($profileId);
 
@@ -3665,10 +3301,10 @@ $response = $service->dynamicTargetingKeys->listDynamicTargetingKeys($profileId)
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listDynamicTargetingKeys` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3691,23 +3327,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Event tag ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->eventTags->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3730,15 +3362,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Event tag ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->eventTags->get($profileId, $id);
 
@@ -3746,10 +3374,10 @@ $response = $service->eventTags->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3772,16 +3400,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_EventTag();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->eventTags->insert($profileId, $requestBody);
 
@@ -3789,10 +3412,10 @@ $response = $service->eventTags->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3815,12 +3438,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listEventTags` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->eventTags->listEventTags($profileId);
 
@@ -3828,10 +3447,10 @@ $response = $service->eventTags->listEventTags($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listEventTags` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3854,19 +3473,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Event tag ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_EventTag();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->eventTags->patch($profileId, $id, $requestBody);
 
@@ -3874,10 +3489,10 @@ $response = $service->eventTags->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3900,16 +3515,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_EventTag();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->eventTags->update($profileId, $requestBody);
 
@@ -3917,10 +3527,10 @@ $response = $service->eventTags->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -3943,17 +3553,13 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The ID of the report.
-$reportId = '0';
+$reportId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report file.
-$fileId = '0';
-
+$fileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 
 // TODO: To download media content, use:
 //
@@ -3965,10 +3571,10 @@ $response = $service->files->get($reportId, $fileId, $optParams);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -3991,14 +3597,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listFiles` method:
-
 // The DFA profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->files->listFiles($profileId, $optParams);
 
@@ -4011,10 +3613,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listFiles` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -4037,23 +3639,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight activity ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->floodlightActivities->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4076,12 +3674,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `generatetag` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->floodlightActivities->generatetag($profileId);
 
@@ -4089,10 +3683,10 @@ $response = $service->floodlightActivities->generatetag($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `generatetag` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4115,15 +3709,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight activity ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->floodlightActivities->get($profileId, $id);
 
@@ -4131,10 +3721,10 @@ $response = $service->floodlightActivities->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4157,16 +3747,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_FloodlightActivity();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->floodlightActivities->insert($profileId, $requestBody);
 
@@ -4174,10 +3759,10 @@ $response = $service->floodlightActivities->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4200,30 +3785,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listFloodlightActivities` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->floodlightActivities->listFloodlightActivities($profileId, $optParams);
 
-  foreach ($response['floodlightActivities'] as $floodlight_activity) {
-    // TODO: Change code below to process each `floodlight_activity` resource:
-    echo '<pre>', var_export($floodlight_activity, true), '</pre>', "\n";
+  foreach ($response['floodlightActivities'] as $floodlightActivity) {
+    // TODO: Change code below to process each `floodlightActivity` resource:
+    echo '<pre>', var_export($floodlightActivity, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listFloodlightActivities` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4246,19 +3827,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight activity ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_FloodlightActivity();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->floodlightActivities->patch($profileId, $id, $requestBody);
 
@@ -4266,10 +3843,10 @@ $response = $service->floodlightActivities->patch($profileId, $id, $requestBody)
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4292,16 +3869,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_FloodlightActivity();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->floodlightActivities->update($profileId, $requestBody);
 
@@ -4309,10 +3881,10 @@ $response = $service->floodlightActivities->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4335,15 +3907,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight activity Group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->floodlightActivityGroups->get($profileId, $id);
 
@@ -4351,10 +3919,10 @@ $response = $service->floodlightActivityGroups->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4377,16 +3945,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_FloodlightActivityGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->floodlightActivityGroups->insert($profileId, $requestBody);
 
@@ -4394,10 +3957,10 @@ $response = $service->floodlightActivityGroups->insert($profileId, $requestBody)
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4420,30 +3983,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listFloodlightActivityGroups` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->floodlightActivityGroups->listFloodlightActivityGroups($profileId, $optParams);
 
-  foreach ($response['floodlightActivityGroups'] as $floodlight_activity_group) {
-    // TODO: Change code below to process each `floodlight_activity_group` resource:
-    echo '<pre>', var_export($floodlight_activity_group, true), '</pre>', "\n";
+  foreach ($response['floodlightActivityGroups'] as $floodlightActivityGroup) {
+    // TODO: Change code below to process each `floodlightActivityGroup` resource:
+    echo '<pre>', var_export($floodlightActivityGroup, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listFloodlightActivityGroups` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4466,19 +4025,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight activity Group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_FloodlightActivityGroup();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->floodlightActivityGroups->patch($profileId, $id, $requestBody);
 
@@ -4486,10 +4041,10 @@ $response = $service->floodlightActivityGroups->patch($profileId, $id, $requestB
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4512,16 +4067,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_FloodlightActivityGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->floodlightActivityGroups->update($profileId, $requestBody);
 
@@ -4529,10 +4079,10 @@ $response = $service->floodlightActivityGroups->update($profileId, $requestBody)
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4555,15 +4105,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight configuration ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->floodlightConfigurations->get($profileId, $id);
 
@@ -4571,10 +4117,10 @@ $response = $service->floodlightConfigurations->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4597,12 +4143,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listFloodlightConfigurations` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->floodlightConfigurations->listFloodlightConfigurations($profileId);
 
@@ -4610,10 +4152,10 @@ $response = $service->floodlightConfigurations->listFloodlightConfigurations($pr
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listFloodlightConfigurations` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4636,19 +4178,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Floodlight configuration ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_FloodlightConfiguration();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->floodlightConfigurations->patch($profileId, $id, $requestBody);
 
@@ -4656,10 +4194,10 @@ $response = $service->floodlightConfigurations->patch($profileId, $id, $requestB
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4682,16 +4220,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_FloodlightConfiguration();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->floodlightConfigurations->update($profileId, $requestBody);
 
@@ -4699,10 +4232,10 @@ $response = $service->floodlightConfigurations->update($profileId, $requestBody)
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4725,18 +4258,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID for order documents.
-$projectId = '0';
+$projectId = '0';  // TODO: Update placeholder value.
 
 // Inventory item ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->inventoryItems->get($profileId, $projectId, $id);
 
@@ -4744,10 +4273,10 @@ $response = $service->inventoryItems->get($profileId, $projectId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4770,33 +4299,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listInventoryItems` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID for order documents.
-$projectId = '0';
-
+$projectId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->inventoryItems->listInventoryItems($profileId, $projectId, $optParams);
 
-  foreach ($response['inventoryItems'] as $inventory_item) {
-    // TODO: Change code below to process each `inventory_item` resource:
-    echo '<pre>', var_export($inventory_item, true), '</pre>', "\n";
+  foreach ($response['inventoryItems'] as $inventoryItem) {
+    // TODO: Change code below to process each `inventoryItem` resource:
+    echo '<pre>', var_export($inventoryItem, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listInventoryItems` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4819,26 +4344,22 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Landing page campaign ID.
-$campaignId = '0';
+$campaignId = '0';  // TODO: Update placeholder value.
 
 // Landing page ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->landingPages->delete($profileId, $campaignId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4861,18 +4382,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Landing page campaign ID.
-$campaignId = '0';
+$campaignId = '0';  // TODO: Update placeholder value.
 
 // Landing page ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->landingPages->get($profileId, $campaignId, $id);
 
@@ -4880,10 +4397,10 @@ $response = $service->landingPages->get($profileId, $campaignId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4906,19 +4423,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Landing page campaign ID.
-$campaignId = '0';
-
+$campaignId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_LandingPage();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->landingPages->insert($profileId, $campaignId, $requestBody);
 
@@ -4926,10 +4438,10 @@ $response = $service->landingPages->insert($profileId, $campaignId, $requestBody
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4952,15 +4464,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listLandingPages` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Landing page campaign ID.
-$campaignId = '0';
-
+$campaignId = '0';  // TODO: Update placeholder value.
 
 $response = $service->landingPages->listLandingPages($profileId, $campaignId);
 
@@ -4968,10 +4476,10 @@ $response = $service->landingPages->listLandingPages($profileId, $campaignId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listLandingPages` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -4994,22 +4502,18 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Landing page campaign ID.
-$campaignId = '0';
+$campaignId = '0';  // TODO: Update placeholder value.
 
 // Landing page ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_LandingPage();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->landingPages->patch($profileId, $campaignId, $id, $requestBody);
 
@@ -5017,10 +4521,10 @@ $response = $service->landingPages->patch($profileId, $campaignId, $id, $request
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5043,19 +4547,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Landing page campaign ID.
-$campaignId = '0';
-
+$campaignId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_LandingPage();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->landingPages->update($profileId, $campaignId, $requestBody);
 
@@ -5063,10 +4562,10 @@ $response = $service->landingPages->update($profileId, $campaignId, $requestBody
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5089,12 +4588,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listLanguages` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->languages->listLanguages($profileId);
 
@@ -5102,10 +4597,10 @@ $response = $service->languages->listLanguages($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listLanguages` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5128,12 +4623,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listMetros` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->metros->listMetros($profileId);
 
@@ -5141,10 +4632,10 @@ $response = $service->metros->listMetros($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listMetros` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5167,15 +4658,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Mobile carrier ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->mobileCarriers->get($profileId, $id);
 
@@ -5183,10 +4670,10 @@ $response = $service->mobileCarriers->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5209,12 +4696,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listMobileCarriers` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->mobileCarriers->listMobileCarriers($profileId);
 
@@ -5222,10 +4705,10 @@ $response = $service->mobileCarriers->listMobileCarriers($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listMobileCarriers` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5248,15 +4731,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Operating system version ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->operatingSystemVersions->get($profileId, $id);
 
@@ -5264,10 +4743,10 @@ $response = $service->operatingSystemVersions->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5290,12 +4769,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listOperatingSystemVersions` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->operatingSystemVersions->listOperatingSystemVersions($profileId);
 
@@ -5303,10 +4778,10 @@ $response = $service->operatingSystemVersions->listOperatingSystemVersions($prof
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listOperatingSystemVersions` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5329,15 +4804,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Operating system DART ID.
-$dartId = '0';
-
+$dartId = '0';  // TODO: Update placeholder value.
 
 $response = $service->operatingSystems->get($profileId, $dartId);
 
@@ -5345,10 +4816,10 @@ $response = $service->operatingSystems->get($profileId, $dartId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5371,12 +4842,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listOperatingSystems` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->operatingSystems->listOperatingSystems($profileId);
 
@@ -5384,10 +4851,10 @@ $response = $service->operatingSystems->listOperatingSystems($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listOperatingSystems` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5410,18 +4877,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID for order documents.
-$projectId = '0';
+$projectId = '0';  // TODO: Update placeholder value.
 
 // Order document ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->orderDocuments->get($profileId, $projectId, $id);
 
@@ -5429,10 +4892,10 @@ $response = $service->orderDocuments->get($profileId, $projectId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5455,33 +4918,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listOrderDocuments` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID for order documents.
-$projectId = '0';
-
+$projectId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->orderDocuments->listOrderDocuments($profileId, $projectId, $optParams);
 
-  foreach ($response['orderDocuments'] as $order_document) {
-    // TODO: Change code below to process each `order_document` resource:
-    echo '<pre>', var_export($order_document, true), '</pre>', "\n";
+  foreach ($response['orderDocuments'] as $orderDocument) {
+    // TODO: Change code below to process each `orderDocument` resource:
+    echo '<pre>', var_export($orderDocument, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listOrderDocuments` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5502,20 +4961,16 @@ require_once __DIR__ . '/vendor/autoload.php';
 
 $client = getClient();
 
-$service = new Google_Service_Dfareporting($client);
-
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
+$service = new Google_Service_Dfareporting($client);
 
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID for orders.
-$projectId = '0';
+$projectId = '0';  // TODO: Update placeholder value.
 
 // Order ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->orders->get($profileId, $projectId, $id);
 
@@ -5523,10 +4978,10 @@ $response = $service->orders->get($profileId, $projectId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5549,17 +5004,13 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listOrders` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID for orders.
-$projectId = '0';
+$projectId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->orders->listOrders($profileId, $projectId, $optParams);
 
@@ -5572,10 +5023,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listOrders` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5598,15 +5049,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->placementGroups->get($profileId, $id);
 
@@ -5614,10 +5061,10 @@ $response = $service->placementGroups->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5640,16 +5087,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_PlacementGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->placementGroups->insert($profileId, $requestBody);
 
@@ -5657,10 +5099,10 @@ $response = $service->placementGroups->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5683,30 +5125,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPlacementGroups` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->placementGroups->listPlacementGroups($profileId, $optParams);
 
-  foreach ($response['placementGroups'] as $placement_group) {
-    // TODO: Change code below to process each `placement_group` resource:
-    echo '<pre>', var_export($placement_group, true), '</pre>', "\n";
+  foreach ($response['placementGroups'] as $placementGroup) {
+    // TODO: Change code below to process each `placementGroup` resource:
+    echo '<pre>', var_export($placementGroup, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPlacementGroups` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5729,19 +5167,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_PlacementGroup();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->placementGroups->patch($profileId, $id, $requestBody);
 
@@ -5749,10 +5183,10 @@ $response = $service->placementGroups->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5775,16 +5209,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_PlacementGroup();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->placementGroups->update($profileId, $requestBody);
 
@@ -5792,10 +5221,10 @@ $response = $service->placementGroups->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5818,23 +5247,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement strategy ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->placementStrategies->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5857,15 +5282,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement strategy ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->placementStrategies->get($profileId, $id);
 
@@ -5873,10 +5294,10 @@ $response = $service->placementStrategies->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5899,16 +5320,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_PlacementStrategy();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->placementStrategies->insert($profileId, $requestBody);
 
@@ -5916,10 +5332,10 @@ $response = $service->placementStrategies->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5942,30 +5358,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPlacementStrategies` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->placementStrategies->listPlacementStrategies($profileId, $optParams);
 
-  foreach ($response['placementStrategies'] as $placement_strategy) {
-    // TODO: Change code below to process each `placement_strategy` resource:
-    echo '<pre>', var_export($placement_strategy, true), '</pre>', "\n";
+  foreach ($response['placementStrategies'] as $placementStrategy) {
+    // TODO: Change code below to process each `placementStrategy` resource:
+    echo '<pre>', var_export($placementStrategy, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPlacementStrategies` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -5988,19 +5400,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement strategy ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_PlacementStrategy();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->placementStrategies->patch($profileId, $id, $requestBody);
 
@@ -6008,10 +5416,10 @@ $response = $service->placementStrategies->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6034,16 +5442,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_PlacementStrategy();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->placementStrategies->update($profileId, $requestBody);
 
@@ -6051,10 +5454,10 @@ $response = $service->placementStrategies->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6077,12 +5480,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `generatetags` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->placements->generatetags($profileId);
 
@@ -6090,10 +5489,10 @@ $response = $service->placements->generatetags($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `generatetags` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6116,15 +5515,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->placements->get($profileId, $id);
 
@@ -6132,10 +5527,10 @@ $response = $service->placements->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6158,16 +5553,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Placement();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->placements->insert($profileId, $requestBody);
 
@@ -6175,10 +5565,10 @@ $response = $service->placements->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6201,14 +5591,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPlacements` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->placements->listPlacements($profileId, $optParams);
 
@@ -6221,10 +5607,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPlacements` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6247,19 +5633,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Placement ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Placement();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->placements->patch($profileId, $id, $requestBody);
 
@@ -6267,10 +5649,10 @@ $response = $service->placements->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6293,16 +5675,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Placement();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->placements->update($profileId, $requestBody);
 
@@ -6310,10 +5687,10 @@ $response = $service->placements->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6336,15 +5713,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Platform type ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->platformTypes->get($profileId, $id);
 
@@ -6352,10 +5725,10 @@ $response = $service->platformTypes->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6378,12 +5751,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPlatformTypes` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->platformTypes->listPlatformTypes($profileId);
 
@@ -6391,10 +5760,10 @@ $response = $service->platformTypes->listPlatformTypes($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPlatformTypes` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6417,15 +5786,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Postal code ID.
-$code = '{MY-CODE}';
-
+$code = '';  // TODO: Update placeholder value.
 
 $response = $service->postalCodes->get($profileId, $code);
 
@@ -6433,10 +5798,10 @@ $response = $service->postalCodes->get($profileId, $code);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6459,12 +5824,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listPostalCodes` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->postalCodes->listPostalCodes($profileId);
 
@@ -6472,10 +5833,10 @@ $response = $service->postalCodes->listPostalCodes($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listPostalCodes` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6498,15 +5859,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Project ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->projects->get($profileId, $id);
 
@@ -6514,10 +5871,10 @@ $response = $service->projects->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6540,14 +5897,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjects` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects->listProjects($profileId, $optParams);
 
@@ -6560,10 +5913,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listProjects` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6586,12 +5939,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listRegions` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->regions->listRegions($profileId);
 
@@ -6599,10 +5948,10 @@ $response = $service->regions->listRegions($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listRegions` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6625,15 +5974,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Remarketing list ID.
-$remarketingListId = '0';
-
+$remarketingListId = '0';  // TODO: Update placeholder value.
 
 $response = $service->remarketingListShares->get($profileId, $remarketingListId);
 
@@ -6641,10 +5986,10 @@ $response = $service->remarketingListShares->get($profileId, $remarketingListId)
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6667,19 +6012,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Remarketing list ID.
-$remarketingListId = '0';
-
+$remarketingListId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_RemarketingListShare();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->remarketingListShares->patch($profileId, $remarketingListId, $requestBody);
 
@@ -6687,10 +6028,10 @@ $response = $service->remarketingListShares->patch($profileId, $remarketingListI
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6713,16 +6054,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_RemarketingListShare();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->remarketingListShares->update($profileId, $requestBody);
 
@@ -6730,10 +6066,10 @@ $response = $service->remarketingListShares->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6756,15 +6092,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Remarketing list ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->remarketingLists->get($profileId, $id);
 
@@ -6772,10 +6104,10 @@ $response = $service->remarketingLists->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6798,16 +6130,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_RemarketingList();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->remarketingLists->insert($profileId, $requestBody);
 
@@ -6815,10 +6142,10 @@ $response = $service->remarketingLists->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6841,33 +6168,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listRemarketingLists` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Select only remarketing lists owned by this advertiser.
-$advertiserId = '0';
+$advertiserId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->remarketingLists->listRemarketingLists($profileId, $advertiserId, $optParams);
 
-  foreach ($response['remarketingLists'] as $remarketing_list) {
-    // TODO: Change code below to process each `remarketing_list` resource:
-    echo '<pre>', var_export($remarketing_list, true), '</pre>', "\n";
+  foreach ($response['remarketingLists'] as $remarketingList) {
+    // TODO: Change code below to process each `remarketingList` resource:
+    echo '<pre>', var_export($remarketingList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listRemarketingLists` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6890,19 +6213,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Remarketing list ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_RemarketingList();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->remarketingLists->patch($profileId, $id, $requestBody);
 
@@ -6910,10 +6229,10 @@ $response = $service->remarketingLists->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6936,16 +6255,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_RemarketingList();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->remarketingLists->update($profileId, $requestBody);
 
@@ -6953,10 +6267,10 @@ $response = $service->remarketingLists->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -6979,16 +6293,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `query` method:
-
 // The DFA user profile ID.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Report();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->reports_compatibleFields->query($profileId, $requestBody);
 
@@ -6996,10 +6305,10 @@ $response = $service->reports_compatibleFields->query($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `query` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7022,23 +6331,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The DFA user profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report.
-$reportId = '0';
-
+$reportId = '0';  // TODO: Update placeholder value.
 
 $service->reports->delete($profileId, $reportId);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7061,20 +6366,16 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The DFA profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report.
-$reportId = '0';
+$reportId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report file.
-$fileId = '0';
+$fileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 
 // TODO: To download media content, use:
 //
@@ -7086,10 +6387,10 @@ $response = $service->reports_files->get($profileId, $reportId, $fileId, $optPar
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7112,17 +6413,13 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listReportsFiles` method:
-
 // The DFA profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the parent report.
-$reportId = '0';
-
+$reportId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->reports_files->listReportsFiles($profileId, $reportId, $optParams);
 
@@ -7135,10 +6432,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listReportsFiles` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7161,15 +6458,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The DFA user profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report.
-$reportId = '0';
-
+$reportId = '0';  // TODO: Update placeholder value.
 
 $response = $service->reports->get($profileId, $reportId);
 
@@ -7177,10 +6470,10 @@ $response = $service->reports->get($profileId, $reportId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7203,16 +6496,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // The DFA user profile ID.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Report();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->reports->insert($profileId, $requestBody);
 
@@ -7220,10 +6508,10 @@ $response = $service->reports->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7246,14 +6534,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listReports` method:
-
 // The DFA user profile ID.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->reports->listReports($profileId, $optParams);
 
@@ -7266,10 +6550,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listReports` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7292,19 +6576,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // The DFA user profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report.
-$reportId = '0';
-
+$reportId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Report();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->reports->patch($profileId, $reportId, $requestBody);
 
@@ -7312,10 +6592,10 @@ $response = $service->reports->patch($profileId, $reportId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7338,15 +6618,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `run` method:
-
 // The DFA profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report.
-$reportId = '0';
-
+$reportId = '0';  // TODO: Update placeholder value.
 
 $response = $service->reports->run($profileId, $reportId);
 
@@ -7354,10 +6630,10 @@ $response = $service->reports->run($profileId, $reportId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `run` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7380,19 +6656,14 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The DFA user profile ID.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // The ID of the report.
-$reportId = '0';
-
+$reportId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Report();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->reports->update($profileId, $reportId, $requestBody);
 
@@ -7400,10 +6671,10 @@ $response = $service->reports->update($profileId, $reportId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfareporting
   return null;
 }
@@ -7426,15 +6697,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Site ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->sites->get($profileId, $id);
 
@@ -7442,10 +6709,10 @@ $response = $service->sites->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7468,16 +6735,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Site();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->sites->insert($profileId, $requestBody);
 
@@ -7485,10 +6747,10 @@ $response = $service->sites->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7511,14 +6773,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listSites` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->sites->listSites($profileId, $optParams);
 
@@ -7531,10 +6789,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listSites` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7557,19 +6815,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Site ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Site();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->sites->patch($profileId, $id, $requestBody);
 
@@ -7577,10 +6831,10 @@ $response = $service->sites->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7603,16 +6857,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Site();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->sites->update($profileId, $requestBody);
 
@@ -7620,10 +6869,10 @@ $response = $service->sites->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7646,15 +6895,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Size ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->sizes->get($profileId, $id);
 
@@ -7662,10 +6907,10 @@ $response = $service->sizes->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7688,16 +6933,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Size();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->sizes->insert($profileId, $requestBody);
 
@@ -7705,10 +6945,10 @@ $response = $service->sizes->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7731,12 +6971,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listSizes` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->sizes->listSizes($profileId);
 
@@ -7744,10 +6980,10 @@ $response = $service->sizes->listSizes($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listSizes` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7770,15 +7006,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Subaccount ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->subaccounts->get($profileId, $id);
 
@@ -7786,10 +7018,10 @@ $response = $service->subaccounts->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7812,16 +7044,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Subaccount();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->subaccounts->insert($profileId, $requestBody);
 
@@ -7829,10 +7056,10 @@ $response = $service->subaccounts->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7855,14 +7082,10 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listSubaccounts` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->subaccounts->listSubaccounts($profileId, $optParams);
 
@@ -7875,10 +7098,10 @@ do {
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listSubaccounts` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7901,19 +7124,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Subaccount ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_Subaccount();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->subaccounts->patch($profileId, $id, $requestBody);
 
@@ -7921,10 +7140,10 @@ $response = $service->subaccounts->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7947,16 +7166,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_Subaccount();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->subaccounts->update($profileId, $requestBody);
 
@@ -7964,10 +7178,10 @@ $response = $service->subaccounts->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -7990,15 +7204,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Remarketing list ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->targetableRemarketingLists->get($profileId, $id);
 
@@ -8006,10 +7216,10 @@ $response = $service->targetableRemarketingLists->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8032,33 +7242,29 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTargetableRemarketingLists` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Select only targetable remarketing lists targetable by these advertisers.
-$advertiserId = '0';
+$advertiserId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetableRemarketingLists->listTargetableRemarketingLists($profileId, $advertiserId, $optParams);
 
-  foreach ($response['targetableRemarketingLists'] as $targetable_remarketing_list) {
-    // TODO: Change code below to process each `targetable_remarketing_list` resource:
-    echo '<pre>', var_export($targetable_remarketing_list, true), '</pre>', "\n";
+  foreach ($response['targetableRemarketingLists'] as $targetableRemarketingList) {
+    // TODO: Change code below to process each `targetableRemarketingList` resource:
+    echo '<pre>', var_export($targetableRemarketingList, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listTargetableRemarketingLists` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8081,15 +7287,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Targeting template ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->targetingTemplates->get($profileId, $id);
 
@@ -8097,10 +7299,10 @@ $response = $service->targetingTemplates->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8123,16 +7325,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_TargetingTemplate();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetingTemplates->insert($profileId, $requestBody);
 
@@ -8140,10 +7337,10 @@ $response = $service->targetingTemplates->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8166,30 +7363,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTargetingTemplates` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->targetingTemplates->listTargetingTemplates($profileId, $optParams);
 
-  foreach ($response['targetingTemplates'] as $targeting_template) {
-    // TODO: Change code below to process each `targeting_template` resource:
-    echo '<pre>', var_export($targeting_template, true), '</pre>', "\n";
+  foreach ($response['targetingTemplates'] as $targetingTemplate) {
+    // TODO: Change code below to process each `targetingTemplate` resource:
+    echo '<pre>', var_export($targetingTemplate, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listTargetingTemplates` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8212,19 +7405,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // Targeting template ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_TargetingTemplate();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->targetingTemplates->patch($profileId, $id, $requestBody);
 
@@ -8232,10 +7421,10 @@ $response = $service->targetingTemplates->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8258,16 +7447,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_TargetingTemplate();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->targetingTemplates->update($profileId, $requestBody);
 
@@ -8275,10 +7459,10 @@ $response = $service->targetingTemplates->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8301,12 +7485,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The user profile ID.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->userProfiles->get($profileId);
 
@@ -8314,10 +7494,10 @@ $response = $service->userProfiles->get($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/dfareporting
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
@@ -8341,17 +7521,16 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
 $response = $service->userProfiles->listUserProfiles();
 
 // TODO: Change code below to process the `response` object:
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listUserProfiles` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/dfareporting
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
@@ -8375,15 +7554,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User role permission group ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->userRolePermissionGroups->get($profileId, $id);
 
@@ -8391,10 +7566,10 @@ $response = $service->userRolePermissionGroups->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8417,12 +7592,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listUserRolePermissionGroups` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->userRolePermissionGroups->listUserRolePermissionGroups($profileId);
 
@@ -8430,10 +7601,10 @@ $response = $service->userRolePermissionGroups->listUserRolePermissionGroups($pr
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listUserRolePermissionGroups` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8456,15 +7627,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User role permission ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->userRolePermissions->get($profileId, $id);
 
@@ -8472,10 +7639,10 @@ $response = $service->userRolePermissions->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8498,12 +7665,8 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listUserRolePermissions` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
 $response = $service->userRolePermissions->listUserRolePermissions($profileId);
 
@@ -8511,10 +7674,10 @@ $response = $service->userRolePermissions->listUserRolePermissions($profileId);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listUserRolePermissions` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8537,23 +7700,19 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User role ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $service->userRoles->delete($profileId, $id);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8576,15 +7735,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User role ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->userRoles->get($profileId, $id);
 
@@ -8592,10 +7747,10 @@ $response = $service->userRoles->get($profileId, $id);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8618,16 +7773,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_UserRole();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->userRoles->insert($profileId, $requestBody);
 
@@ -8635,10 +7785,10 @@ $response = $service->userRoles->insert($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8661,30 +7811,26 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listUserRoles` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->userRoles->listUserRoles($profileId, $optParams);
 
-  foreach ($response['userRoles'] as $user_role) {
-    // TODO: Change code below to process each `user_role` resource:
-    echo '<pre>', var_export($user_role, true), '</pre>', "\n";
+  foreach ($response['userRoles'] as $userRole) {
+    // TODO: Change code below to process each `userRole` resource:
+    echo '<pre>', var_export($userRole, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
 } while ($optParams['pageToken']);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listUserRoles` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8707,19 +7853,15 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
+$profileId = '0';  // TODO: Update placeholder value.
 
 // User role ID.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Dfareporting_UserRole();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->userRoles->patch($profileId, $id, $requestBody);
 
@@ -8727,10 +7869,10 @@ $response = $service->userRoles->patch($profileId, $id, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
@@ -8753,16 +7895,11 @@ $client = getClient();
 
 $service = new Google_Service_Dfareporting($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // User profile ID associated with this request.
-$profileId = '0';
-
+$profileId = '0';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dfareporting_UserRole();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->userRoles->update($profileId, $requestBody);
 
@@ -8770,10 +7907,10 @@ $response = $service->userRoles->update($profileId, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using the following scope:
   //   https://www.googleapis.com/auth/dfatrafficking
   return null;
 }
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dns.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dns.v1.json.baseline
index c2ae31eb7c..7f66ce4569 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dns.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_dns.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,19 +26,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `create` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Identifies the managed zone addressed by this request. Can be the managed zone name or id.
-$managedZone = '{MY-MANAGED-ZONE}';
-
+$managedZone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dns_Change();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->changes->create($project, $managedZone, $requestBody);
 
@@ -55,8 +49,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -64,9 +60,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -74,18 +67,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Identifies the managed zone addressed by this request. Can be the managed zone name or id.
-$managedZone = '{MY-MANAGED-ZONE}';
+$managedZone = '';  // TODO: Update placeholder value.
 
 // The identifier of the requested change, from a previous ResourceRecordSetsChangeResponse.
-$changeId = '{MY-CHANGE-ID}';
-
+$changeId = '';  // TODO: Update placeholder value.
 
 $response = $service->changes->get($project, $managedZone, $changeId);
 
@@ -101,8 +90,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -110,9 +101,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -120,17 +108,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listChanges` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Identifies the managed zone addressed by this request. Can be the managed zone name or id.
-$managedZone = '{MY-MANAGED-ZONE}';
-
+$managedZone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->changes->listChanges($project, $managedZone, $optParams);
 
@@ -151,8 +135,10 @@ do {
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -160,9 +146,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -170,16 +153,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Dns_ManagedZone();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->managedZones->create($project, $requestBody);
 
@@ -195,8 +173,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -204,9 +184,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -214,15 +191,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Identifies the managed zone addressed by this request. Can be the managed zone name or id.
-$managedZone = '{MY-MANAGED-ZONE}';
-
+$managedZone = '';  // TODO: Update placeholder value.
 
 $service->managedZones->delete($project, $managedZone);
 ?>
@@ -235,8 +208,10 @@ $service->managedZones->delete($project, $managedZone);
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -244,9 +219,6 @@ $service->managedZones->delete($project, $managedZone);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -254,15 +226,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Identifies the managed zone addressed by this request. Can be the managed zone name or id.
-$managedZone = '{MY-MANAGED-ZONE}';
-
+$managedZone = '';  // TODO: Update placeholder value.
 
 $response = $service->managedZones->get($project, $managedZone);
 
@@ -278,8 +246,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -287,9 +257,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -297,20 +264,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listManagedZones` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->managedZones->listManagedZones($project, $optParams);
 
-  foreach ($response['managedZones'] as $managed_zone) {
-    // TODO: Change code below to process each `managed_zone` resource:
-    echo '<pre>', var_export($managed_zone, true), '</pre>', "\n";
+  foreach ($response['managedZones'] as $managedZone) {
+    // TODO: Change code below to process each `managedZone` resource:
+    echo '<pre>', var_export($managedZone, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -325,8 +288,10 @@ do {
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -334,9 +299,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -344,12 +306,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
 $response = $service->projects->get($project);
 
@@ -365,8 +323,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/dns
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -374,9 +334,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-DnsSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -384,23 +341,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Dns($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listResourceRecordSets` method:
-
 // Identifies the project addressed by this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Identifies the managed zone addressed by this request. Can be the managed zone name or id.
-$managedZone = '{MY-MANAGED-ZONE}';
-
+$managedZone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->resourceRecordSets->listResourceRecordSets($project, $managedZone, $optParams);
 
-  foreach ($response['rrsets'] as $resource_record_set) {
-    // TODO: Change code below to process each `resource_record_set` resource:
-    echo '<pre>', var_export($resource_record_set, true), '</pre>', "\n";
+  foreach ($response['rrsets'] as $resourceRecordSet) {
+    // TODO: Change code below to process each `resourceRecordSet` resource:
+    echo '<pre>', var_export($resourceRecordSet, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_logging.v2beta1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_logging.v2beta1.json.baseline
index a622ef1a03..04258205e8 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_logging.v2beta1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_logging.v2beta1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,13 +26,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // Required. The resource name of the log to delete.  Example:
 // `"projects/my-project/logs/syslog"`.
-$logName = 'billingAccounts/{MY-BILLINGACCOUNT}/logs/{MY-LOG}';
-
+$logName = '';  // TODO: Update placeholder value.
+// ex: 'billingAccounts/my-billingAccount/logs/my-log'
 
 $service->billingAccounts_logs->delete($logName);
 ?>
@@ -46,8 +42,10 @@ $service->billingAccounts_logs->delete($logName);
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -55,9 +53,6 @@ $service->billingAccounts_logs->delete($logName);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -65,18 +60,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Logging_ListLogEntriesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->entries->listEntries($requestBody, $optParams);
 
-  foreach ($response['entries'] as $log_entry) {
-    // TODO: Change code below to process each `log_entry` resource:
-    echo '<pre>', var_export($log_entry, true), '</pre>', "\n";
+  foreach ($response['entries'] as $logEntry) {
+    // TODO: Change code below to process each `logEntry` resource:
+    echo '<pre>', var_export($logEntry, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -91,8 +84,10 @@ do {
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -100,9 +95,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -110,10 +102,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Logging_WriteLogEntriesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->entries->write($requestBody);
 
@@ -129,8 +119,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -138,9 +130,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -148,14 +137,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->monitoredResourceDescriptors->listMonitoredResourceDescriptors($optParams);
 
-  foreach ($response['resourceDescriptors'] as $monitored_resource_descriptor) {
-    // TODO: Change code below to process each `monitored_resource_descriptor` resource:
-    echo '<pre>', var_export($monitored_resource_descriptor, true), '</pre>', "\n";
+  foreach ($response['resourceDescriptors'] as $monitoredResourceDescriptor) {
+    // TODO: Change code below to process each `monitoredResourceDescriptor` resource:
+    echo '<pre>', var_export($monitoredResourceDescriptor, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -170,8 +158,10 @@ do {
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -179,9 +169,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -189,13 +176,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // Required. The resource name of the log to delete.  Example:
 // `"projects/my-project/logs/syslog"`.
-$logName = 'organizations/{MY-ORGANIZATION}/logs/{MY-LOG}';
-
+$logName = '';  // TODO: Update placeholder value.
+// ex: 'organizations/my-organization/logs/my-log'
 
 $service->organizations_logs->delete($logName);
 ?>
@@ -208,8 +192,10 @@ $service->organizations_logs->delete($logName);
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -217,9 +203,6 @@ $service->organizations_logs->delete($logName);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -227,13 +210,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // Required. The resource name of the log to delete.  Example:
 // `"projects/my-project/logs/syslog"`.
-$logName = 'projects/{MY-PROJECT}/logs/{MY-LOG}';
-
+$logName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/logs/my-log'
 
 $service->projects_logs->delete($logName);
 ?>
@@ -246,8 +226,10 @@ $service->projects_logs->delete($logName);
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -255,9 +237,6 @@ $service->projects_logs->delete($logName);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -265,18 +244,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // The resource name of the project in which to create the metric.
 // Example: `"projects/my-project-id"`.
 // The new metric must be provided in the request.
-$parent = 'projects/{MY-PROJECT}';
-
+$parent = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Logging_LogMetric();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_metrics->create($parent, $requestBody);
 
@@ -292,8 +267,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -301,9 +278,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -311,13 +285,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // The resource name of the metric to delete.
 // Example: `"projects/my-project-id/metrics/my-metric-id"`.
-$metricName = 'projects/{MY-PROJECT}/metrics/{MY-METRIC}';
-
+$metricName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/metrics/my-metric'
 
 $service->projects_metrics->delete($metricName);
 ?>
@@ -330,8 +301,10 @@ $service->projects_metrics->delete($metricName);
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -339,9 +312,6 @@ $service->projects_metrics->delete($metricName);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -349,13 +319,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The resource name of the desired metric.
 // Example: `"projects/my-project-id/metrics/my-metric-id"`.
-$metricName = 'projects/{MY-PROJECT}/metrics/{MY-METRIC}';
-
+$metricName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/metrics/my-metric'
 
 $response = $service->projects_metrics->get($metricName);
 
@@ -371,8 +338,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -380,9 +349,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -390,21 +356,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsMetrics` method:
-
 // Required. The resource name containing the metrics.
 // Example: `"projects/my-project-id"`.
-$parent = 'projects/{MY-PROJECT}';
-
+$parent = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_metrics->listProjectsMetrics($parent, $optParams);
 
-  foreach ($response['metrics'] as $log_metric) {
-    // TODO: Change code below to process each `log_metric` resource:
-    echo '<pre>', var_export($log_metric, true), '</pre>', "\n";
+  foreach ($response['metrics'] as $logMetric) {
+    // TODO: Change code below to process each `logMetric` resource:
+    echo '<pre>', var_export($logMetric, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -419,8 +382,10 @@ do {
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -428,9 +393,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -438,20 +400,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // The resource name of the metric to update.
 // Example: `"projects/my-project-id/metrics/my-metric-id"`.
 // The updated metric must be provided in the request and have the
 // same identifier that is specified in `metricName`.
 // If the metric does not exist, it is created.
-$metricName = 'projects/{MY-PROJECT}/metrics/{MY-METRIC}';
-
+$metricName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/metrics/my-metric'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Logging_LogMetric();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_metrics->update($metricName, $requestBody);
 
@@ -467,8 +425,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -476,9 +436,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -486,18 +443,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // Required. The resource in which to create the sink.
 // Example: `"projects/my-project-id"`.
 // The new sink must be provided in the request.
-$parent = 'projects/{MY-PROJECT}';
-
+$parent = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Logging_LogSink();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_sinks->create($parent, $requestBody);
 
@@ -513,8 +466,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -522,9 +477,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -532,15 +484,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // Required. The resource name of the sink to delete, including the parent
 // resource and the sink identifier.  Example:
 // `"projects/my-project-id/sinks/my-sink-id"`.  It is an error if the sink
 // does not exist.
-$sinkName = 'projects/{MY-PROJECT}/sinks/{MY-SINK}';
-
+$sinkName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/sinks/my-sink'
 
 $service->projects_sinks->delete($sinkName);
 ?>
@@ -553,8 +502,10 @@ $service->projects_sinks->delete($sinkName);
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -562,9 +513,6 @@ $service->projects_sinks->delete($sinkName);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -572,13 +520,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // Required. The resource name of the sink to return.
 // Example: `"projects/my-project-id/sinks/my-sink-id"`.
-$sinkName = 'projects/{MY-PROJECT}/sinks/{MY-SINK}';
-
+$sinkName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/sinks/my-sink'
 
 $response = $service->projects_sinks->get($sinkName);
 
@@ -594,8 +539,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -603,9 +550,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -613,21 +557,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsSinks` method:
-
 // Required. The cloud resource containing the sinks.
 // Example: `"projects/my-logging-project"`.
-$parent = 'projects/{MY-PROJECT}';
-
+$parent = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_sinks->listProjectsSinks($parent, $optParams);
 
-  foreach ($response['sinks'] as $log_sink) {
-    // TODO: Change code below to process each `log_sink` resource:
-    echo '<pre>', var_export($log_sink, true), '</pre>', "\n";
+  foreach ($response['sinks'] as $logSink) {
+    // TODO: Change code below to process each `logSink` resource:
+    echo '<pre>', var_export($logSink, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -642,8 +583,10 @@ do {
  *    https://console.developers.google.com/apis/api/logging
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -651,9 +594,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-LoggingSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -661,18 +601,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Logging($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // Required. The resource name of the sink to update, including the parent
 // resource and the sink identifier.  If the sink does not exist, this method
 // creates the sink.  Example: `"projects/my-project-id/sinks/my-sink-id"`.
-$sinkName = 'projects/{MY-PROJECT}/sinks/{MY-SINK}';
-
+$sinkName = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/sinks/my-sink'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Logging_LogSink();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_sinks->update($sinkName, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_prediction.v1.6.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_prediction.v1.6.json.baseline
index 7d00f699c3..e43dcea6ba 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_prediction.v1.6.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_prediction.v1.6.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,19 +26,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `predict` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of a hosted model.
-$hostedModelName = '{MY-HOSTED-MODEL-NAME}';
-
+$hostedModelName = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Prediction_Input();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->hostedmodels->predict($project, $hostedModelName, $requestBody);
 
@@ -55,8 +49,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -64,9 +60,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -74,15 +67,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `analyze` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The unique name for the predictive model.
-$id = '{MY-ID}';
-
+$id = '';  // TODO: Update placeholder value.
 
 $response = $service->trainedmodels->analyze($project, $id);
 
@@ -98,8 +87,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -107,9 +98,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -117,15 +105,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The unique name for the predictive model.
-$id = '{MY-ID}';
-
+$id = '';  // TODO: Update placeholder value.
 
 $service->trainedmodels->delete($project, $id);
 ?>
@@ -138,8 +122,10 @@ $service->trainedmodels->delete($project, $id);
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -147,9 +133,6 @@ $service->trainedmodels->delete($project, $id);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -157,15 +140,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The unique name for the predictive model.
-$id = '{MY-ID}';
-
+$id = '';  // TODO: Update placeholder value.
 
 $response = $service->trainedmodels->get($project, $id);
 
@@ -181,8 +160,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -190,9 +171,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -200,16 +178,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Prediction_Insert();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->trainedmodels->insert($project, $requestBody);
 
@@ -225,8 +198,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -234,9 +209,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -244,14 +216,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTrainedmodels` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->trainedmodels->listTrainedmodels($project, $optParams);
 
@@ -272,8 +240,10 @@ do {
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -281,9 +251,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -291,19 +258,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `predict` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The unique name for the predictive model.
-$id = '{MY-ID}';
-
+$id = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Prediction_Input();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->trainedmodels->predict($project, $id, $requestBody);
 
@@ -319,8 +281,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/prediction
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -328,9 +292,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PredictionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -338,19 +299,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Prediction($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The project associated with the model.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The unique name for the predictive model.
-$id = '{MY-ID}';
-
+$id = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Prediction_Update();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->trainedmodels->update($project, $id, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_pubsub.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_pubsub.v1.json.baseline
index 285aa94490..76ba908d33 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_pubsub.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_pubsub.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,13 +26,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `getIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/snapshots/{MY-SNAPSHOT}';
-
+// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/snapshots/my-snapshot'
 
 $response = $service->projects_snapshots->getIamPolicy($resource);
 
@@ -49,8 +45,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -58,9 +56,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -68,17 +63,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
+// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/snapshots/my-snapshot'
 
-// TODO: Change placeholder below to desired parameter value for the `setIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/snapshots/{MY-SNAPSHOT}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_SetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_snapshots->setIamPolicy($resource, $requestBody);
 
@@ -94,8 +85,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -103,9 +96,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -113,17 +103,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `testIamPermissions` method:
-
 // REQUIRED: The resource for which the policy detail is being requested. `resource` is usually
 // specified as a path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/snapshots/{MY-SNAPSHOT}';
-
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/snapshots/my-snapshot'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_TestIamPermissionsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_snapshots->testIamPermissions($resource, $requestBody);
 
@@ -139,8 +125,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -148,9 +136,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -158,16 +143,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `acknowledge` method:
-
 // The subscription whose message is being acknowledged.
-$subscription = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$subscription = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_AcknowledgeRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->projects_subscriptions->acknowledge($subscription, $requestBody);
 ?>
@@ -180,8 +161,10 @@ $service->projects_subscriptions->acknowledge($subscription, $requestBody);
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -189,9 +172,6 @@ $service->projects_subscriptions->acknowledge($subscription, $requestBody);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -199,20 +179,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
 // The name of the subscription. It must have the format
 // `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must start with a letter, and
 // contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores (`_`), periods
 // (`.`), tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters in
 // length, and it must not start with `"goog"`.
-$name = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_Subscription();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_subscriptions->create($name, $requestBody);
 
@@ -228,8 +204,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -237,9 +215,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -247,12 +222,9 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // The subscription to delete.
-$subscription = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$subscription = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
 $service->projects_subscriptions->delete($subscription);
 ?>
@@ -265,8 +237,10 @@ $service->projects_subscriptions->delete($subscription);
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -274,9 +248,6 @@ $service->projects_subscriptions->delete($subscription);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -284,12 +255,9 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The name of the subscription to get.
-$subscription = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$subscription = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
 $response = $service->projects_subscriptions->get($subscription);
 
@@ -305,8 +273,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -314,9 +284,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -324,13 +291,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `getIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
 $response = $service->projects_subscriptions->getIamPolicy($resource);
 
@@ -346,8 +310,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -355,9 +321,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -365,14 +328,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsSubscriptions` method:
-
 // The name of the cloud project that subscriptions belong to.
-$project = 'projects/{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_subscriptions->listProjectsSubscriptions($project, $optParams);
 
@@ -393,8 +353,10 @@ do {
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -402,9 +364,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -412,16 +371,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `modifyAckDeadline` method:
-
 // The name of the subscription.
-$subscription = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$subscription = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_ModifyAckDeadlineRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->projects_subscriptions->modifyAckDeadline($subscription, $requestBody);
 ?>
@@ -434,8 +389,10 @@ $service->projects_subscriptions->modifyAckDeadline($subscription, $requestBody)
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -443,9 +400,6 @@ $service->projects_subscriptions->modifyAckDeadline($subscription, $requestBody)
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -453,16 +407,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `modifyPushConfig` method:
-
 // The name of the subscription.
-$subscription = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$subscription = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_ModifyPushConfigRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->projects_subscriptions->modifyPushConfig($subscription, $requestBody);
 ?>
@@ -475,8 +425,10 @@ $service->projects_subscriptions->modifyPushConfig($subscription, $requestBody);
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -484,9 +436,6 @@ $service->projects_subscriptions->modifyPushConfig($subscription, $requestBody);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -494,16 +443,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `pull` method:
-
 // The subscription from which messages should be pulled.
-$subscription = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$subscription = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_PullRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_subscriptions->pull($subscription, $requestBody);
 
@@ -519,8 +464,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -528,9 +475,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -538,17 +482,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
+// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
-// TODO: Change placeholder below to desired parameter value for the `setIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_SetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_subscriptions->setIamPolicy($resource, $requestBody);
 
@@ -564,8 +504,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -573,9 +515,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -583,17 +522,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `testIamPermissions` method:
-
 // REQUIRED: The resource for which the policy detail is being requested. `resource` is usually
 // specified as a path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/subscriptions/{MY-SUBSCRIPTION}';
-
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/subscriptions/my-subscription'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_TestIamPermissionsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_subscriptions->testIamPermissions($resource, $requestBody);
 
@@ -609,8 +544,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -618,9 +555,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -628,19 +562,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `create` method:
-
-// The name of the topic. It must have the format `"projects/{project}/topics/{topic}"`. `{topic}` must
-// start with a letter, and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
+// The name of the topic. It must have the format `"projects/{project}/topics/{topic}"`. `{topic}`
+// must start with a letter, and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
 // underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent signs (`%`). It must be
 // between 3 and 255 characters in length, and it must not start with `"goog"`.
-$name = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
+$name = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_Topic();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_topics->create($name, $requestBody);
 
@@ -656,8 +586,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -665,9 +597,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -675,12 +604,9 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // Name of the topic to delete.
-$topic = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
+$topic = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
 $service->projects_topics->delete($topic);
 ?>
@@ -693,8 +619,10 @@ $service->projects_topics->delete($topic);
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -702,9 +630,6 @@ $service->projects_topics->delete($topic);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -712,12 +637,9 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The name of the topic to get.
-$topic = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
+$topic = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
 $response = $service->projects_topics->get($topic);
 
@@ -733,8 +655,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -742,9 +666,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -752,13 +673,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `getIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
+// REQUIRED: The resource for which the policy is being requested. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
 $response = $service->projects_topics->getIamPolicy($resource);
 
@@ -774,8 +692,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -783,9 +703,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -793,14 +710,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsTopics` method:
-
 // The name of the cloud project that topics belong to.
-$project = 'projects/{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project'
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_topics->listProjectsTopics($project, $optParams);
 
@@ -821,8 +735,10 @@ do {
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -830,9 +746,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -840,16 +753,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `publish` method:
-
 // The messages in the request will be published on this topic.
-$topic = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
+$topic = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_PublishRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_topics->publish($topic, $requestBody);
 
@@ -865,8 +774,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -874,9 +785,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -884,17 +792,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
+// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as
+// a path. For example, a Project resource is specified as `projects/{project}`.
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
-// TODO: Change placeholder below to desired parameter value for the `setIamPolicy` method:
-
-// REQUIRED: The resource for which the policy is being specified. `resource` is usually specified as a
-// path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_SetIamPolicyRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_topics->setIamPolicy($resource, $requestBody);
 
@@ -910,8 +814,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -919,9 +825,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -929,14 +832,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listProjectsTopicsSubscriptions` method:
-
 // The name of the topic that subscriptions are attached to.
-$topic = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
+$topic = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->projects_topics_subscriptions->listProjectsTopicsSubscriptions($topic, $optParams);
 
@@ -957,8 +857,10 @@ do {
  *    https://console.developers.google.com/apis/api/pubsub
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -966,9 +868,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-PubsubSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -976,17 +875,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Pubsub($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `testIamPermissions` method:
-
 // REQUIRED: The resource for which the policy detail is being requested. `resource` is usually
 // specified as a path. For example, a Project resource is specified as `projects/{project}`.
-$resource = 'projects/{MY-PROJECT}/topics/{MY-TOPIC}';
-
+$resource = '';  // TODO: Update placeholder value.
+// ex: 'projects/my-project/topics/my-topic'
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Pubsub_TestIamPermissionsRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->projects_topics->testIamPermissions($resource, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_replicapoolupdater.v1beta1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_replicapoolupdater.v1beta1.json.baseline
index ee78a74923..a0c6179cd1 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_replicapoolupdater.v1beta1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_replicapoolupdater.v1beta1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,18 +26,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `cancel` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the update.
-$rollingUpdate = '{MY-ROLLING-UPDATE}';
-
+$rollingUpdate = '';  // TODO: Update placeholder value.
 
 $response = $service->rollingUpdates->cancel($project, $zone, $rollingUpdate);
 
@@ -54,8 +49,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -63,9 +60,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -73,18 +67,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the update.
-$rollingUpdate = '{MY-ROLLING-UPDATE}';
-
+$rollingUpdate = '';  // TODO: Update placeholder value.
 
 $response = $service->rollingUpdates->get($project, $zone, $rollingUpdate);
 
@@ -100,8 +90,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -109,9 +101,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -119,19 +108,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Replicapoolupdater_RollingUpdate();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->rollingUpdates->insert($project, $zone, $requestBody);
 
@@ -147,8 +131,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -156,9 +142,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -166,23 +149,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listRollingUpdates` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->rollingUpdates->listRollingUpdates($project, $zone, $optParams);
 
-  foreach ($response['items'] as $rolling_update) {
-    // TODO: Change code below to process each `rolling_update` resource:
-    echo '<pre>', var_export($rolling_update, true), '</pre>', "\n";
+  foreach ($response['items'] as $rollingUpdate) {
+    // TODO: Change code below to process each `rollingUpdate` resource:
+    echo '<pre>', var_export($rollingUpdate, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -197,8 +176,10 @@ do {
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -206,9 +187,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -216,26 +194,22 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listInstanceUpdates` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the update.
-$rollingUpdate = '{MY-ROLLING-UPDATE}';
-
+$rollingUpdate = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->rollingUpdates->listInstanceUpdates($project, $zone, $rollingUpdate, $optParams);
 
-  foreach ($response['items'] as $instance_update) {
-    // TODO: Change code below to process each `instance_update` resource:
-    echo '<pre>', var_export($instance_update, true), '</pre>', "\n";
+  foreach ($response['items'] as $instanceUpdate) {
+    // TODO: Change code below to process each `instanceUpdate` resource:
+    echo '<pre>', var_export($instanceUpdate, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -250,8 +224,10 @@ do {
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -259,9 +235,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -269,18 +242,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `pause` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the update.
-$rollingUpdate = '{MY-ROLLING-UPDATE}';
-
+$rollingUpdate = '';  // TODO: Update placeholder value.
 
 $response = $service->rollingUpdates->pause($project, $zone, $rollingUpdate);
 
@@ -296,8 +265,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -305,9 +276,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -315,18 +283,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `resume` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the update.
-$rollingUpdate = '{MY-ROLLING-UPDATE}';
-
+$rollingUpdate = '';  // TODO: Update placeholder value.
 
 $response = $service->rollingUpdates->resume($project, $zone, $rollingUpdate);
 
@@ -342,8 +306,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -351,9 +317,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -361,18 +324,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `rollback` method:
-
 // The Google Developers Console project name.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The name of the zone in which the update's target resides.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // The name of the update.
-$rollingUpdate = '{MY-ROLLING-UPDATE}';
-
+$rollingUpdate = '';  // TODO: Update placeholder value.
 
 $response = $service->rollingUpdates->rollback($project, $zone, $rollingUpdate);
 
@@ -388,8 +347,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -397,9 +358,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -407,18 +365,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Name of the project scoping this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone scoping this request.
-$zone = '{MY-ZONE}';
+$zone = '';  // TODO: Update placeholder value.
 
 // Name of the operation resource to return.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->zoneOperations->get($project, $zone, $operation);
 
@@ -434,8 +388,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/replicapoolupdater
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -443,9 +399,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-ReplicapoolupdaterSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -453,17 +406,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Replicapoolupdater($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listZoneOperations` method:
-
 // Name of the project scoping this request.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Name of the zone scoping this request.
-$zone = '{MY-ZONE}';
-
+$zone = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->zoneOperations->listZoneOperations($project, $zone, $optParams);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_sqladmin.v1beta4.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_sqladmin.v1beta4.json.baseline
index fc373d17a1..5f107da3a6 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_sqladmin.v1beta4.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_sqladmin.v1beta4.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,18 +26,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // The ID of the Backup Run to delete. To find a Backup Run ID, use the list method.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->backupRuns->delete($project, $instance, $id);
 
@@ -54,8 +49,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -63,9 +60,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -73,18 +67,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // The ID of this Backup Run.
-$id = '0';
-
+$id = '0';  // TODO: Update placeholder value.
 
 $response = $service->backupRuns->get($project, $instance, $id);
 
@@ -100,8 +90,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -109,9 +101,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -119,19 +108,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_BackupRun();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->backupRuns->insert($project, $instance, $requestBody);
 
@@ -147,8 +131,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -156,9 +142,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -166,23 +149,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listBackupRuns` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->backupRuns->listBackupRuns($project, $instance, $optParams);
 
-  foreach ($response['items'] as $backup_run) {
-    // TODO: Change code below to process each `backup_run` resource:
-    echo '<pre>', var_export($backup_run, true), '</pre>', "\n";
+  foreach ($response['items'] as $backupRun) {
+    // TODO: Change code below to process each `backupRun` resource:
+    echo '<pre>', var_export($backupRun, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -197,8 +176,10 @@ do {
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -206,9 +187,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -216,18 +194,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Name of the database to be deleted in the instance.
-$database = '{MY-DATABASE}';
-
+$database = '';  // TODO: Update placeholder value.
 
 $response = $service->databases->delete($project, $instance, $database);
 
@@ -243,8 +217,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -252,9 +228,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -262,18 +235,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Name of the database in the instance.
-$database = '{MY-DATABASE}';
-
+$database = '';  // TODO: Update placeholder value.
 
 $response = $service->databases->get($project, $instance, $database);
 
@@ -289,8 +258,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -298,9 +269,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -308,19 +276,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_Database();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->databases->insert($project, $instance, $requestBody);
 
@@ -336,8 +299,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -345,9 +310,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -355,15 +317,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listDatabases` method:
-
 // Project ID of the project for which to list Cloud SQL instances.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->databases->listDatabases($project, $instance);
 
@@ -379,8 +337,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -388,9 +348,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -398,22 +355,18 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Name of the database to be updated in the instance.
-$database = '{MY-DATABASE}';
-
+$database = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_SQLAdmin_Database();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->databases->patch($project, $instance, $database, $requestBody);
 
@@ -429,8 +382,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -438,9 +393,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -448,22 +400,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Name of the database to be updated in the instance.
-$database = '{MY-DATABASE}';
-
+$database = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_Database();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->databases->update($project, $instance, $database, $requestBody);
 
@@ -479,8 +426,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -488,9 +437,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -498,7 +444,6 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
 $response = $service->flags->listFlags();
 
 // TODO: Change code below to process the `response` object:
@@ -513,8 +458,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -522,9 +469,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -532,19 +476,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `cloneInstances` method:
-
 // Project ID of the source as well as the clone Cloud SQL instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The ID of the Cloud SQL instance to be cloned (source). This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_InstancesCloneRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->cloneInstances($project, $instance, $requestBody);
 
@@ -560,8 +499,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -569,9 +510,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -579,15 +517,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the project that contains the instance to be deleted.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->delete($project, $instance);
 
@@ -603,8 +537,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -612,9 +548,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -622,19 +555,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `export` method:
-
 // Project ID of the project that contains the instance to be exported.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_InstancesExportRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->export($project, $instance, $requestBody);
 
@@ -650,8 +578,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -659,9 +589,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -669,19 +596,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `failover` method:
-
 // ID of the project that contains the read replica.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_InstancesFailoverRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->failover($project, $instance, $requestBody);
 
@@ -697,8 +619,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -706,9 +630,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -716,15 +637,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->get($project, $instance);
 
@@ -740,8 +657,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -749,9 +668,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -759,19 +675,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `import` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_InstancesImportRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->import($project, $instance, $requestBody);
 
@@ -787,8 +698,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -796,9 +709,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -806,16 +716,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Project ID of the project to which the newly created Cloud SQL instances should belong.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_DatabaseInstance();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->insert($project, $requestBody);
 
@@ -831,8 +736,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -840,9 +747,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -850,20 +754,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listInstances` method:
-
 // Project ID of the project for which to list Cloud SQL instances.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->instances->listInstances($project, $optParams);
 
-  foreach ($response['items'] as $database_instance) {
-    // TODO: Change code below to process each `database_instance` resource:
-    echo '<pre>', var_export($database_instance, true), '</pre>', "\n";
+  foreach ($response['items'] as $databaseInstance) {
+    // TODO: Change code below to process each `databaseInstance` resource:
+    echo '<pre>', var_export($databaseInstance, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -878,8 +778,10 @@ do {
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -887,9 +789,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -897,19 +796,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_SQLAdmin_DatabaseInstance();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->instances->patch($project, $instance, $requestBody);
 
@@ -925,8 +820,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -934,9 +831,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -944,15 +838,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `promoteReplica` method:
-
 // ID of the project that contains the read replica.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL read replica instance name.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->promoteReplica($project, $instance);
 
@@ -968,8 +858,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -977,9 +869,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -987,15 +876,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `resetSslConfig` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->resetSslConfig($project, $instance);
 
@@ -1011,8 +896,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1020,9 +907,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1030,15 +914,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `restart` method:
-
 // Project ID of the project that contains the instance to be restarted.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->restart($project, $instance);
 
@@ -1054,8 +934,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1063,9 +945,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1073,19 +952,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `restoreBackup` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_InstancesRestoreBackupRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->restoreBackup($project, $instance, $requestBody);
 
@@ -1101,8 +975,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1110,9 +986,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1120,15 +993,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `startReplica` method:
-
 // ID of the project that contains the read replica.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL read replica instance name.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->startReplica($project, $instance);
 
@@ -1144,8 +1013,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1153,9 +1024,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1163,15 +1031,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `stopReplica` method:
-
 // ID of the project that contains the read replica.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL read replica instance name.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->instances->stopReplica($project, $instance);
 
@@ -1187,8 +1051,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1196,9 +1062,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1206,19 +1069,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_DatabaseInstance();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->instances->update($project, $instance, $requestBody);
 
@@ -1234,8 +1092,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1243,9 +1103,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1253,15 +1110,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Instance operation ID.
-$operation = '{MY-OPERATION}';
-
+$operation = '';  // TODO: Update placeholder value.
 
 $response = $service->operations->get($project, $operation);
 
@@ -1277,8 +1130,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1286,9 +1141,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1296,17 +1148,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listOperations` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->operations->listOperations($project, $instance, $optParams);
 
@@ -1327,8 +1175,10 @@ do {
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1336,9 +1186,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1346,19 +1193,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `createEphemeral` method:
-
 // Project ID of the Cloud SQL project.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_SslCertsCreateEphemeralRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->sslCerts->createEphemeral($project, $instance, $requestBody);
 
@@ -1374,8 +1216,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1383,9 +1227,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1393,18 +1234,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the project that contains the instance to be deleted.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Sha1 FingerPrint.
-$sha1Fingerprint = '{MY-SHA1-FINGERPRINT}';
-
+$sha1Fingerprint = '';  // TODO: Update placeholder value.
 
 $response = $service->sslCerts->delete($project, $instance, $sha1Fingerprint);
 
@@ -1420,8 +1257,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1429,9 +1268,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1439,18 +1275,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Sha1 FingerPrint.
-$sha1Fingerprint = '{MY-SHA1-FINGERPRINT}';
-
+$sha1Fingerprint = '';  // TODO: Update placeholder value.
 
 $response = $service->sslCerts->get($project, $instance, $sha1Fingerprint);
 
@@ -1466,8 +1298,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1475,9 +1309,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1485,19 +1316,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID of the project to which the newly created Cloud SQL instances should belong.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_SslCertsInsertRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->sslCerts->insert($project, $instance, $requestBody);
 
@@ -1513,8 +1339,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1522,9 +1350,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1532,15 +1357,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listSslCerts` method:
-
 // Project ID of the project for which to list Cloud SQL instances.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Cloud SQL instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->sslCerts->listSslCerts($project, $instance);
 
@@ -1556,8 +1377,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1565,9 +1388,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1575,12 +1395,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTiers` method:
-
 // Project ID of the project for which to list tiers.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
 $response = $service->tiers->listTiers($project);
 
@@ -1596,8 +1412,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1605,9 +1423,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1615,21 +1430,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Host of the user in the instance.
-$host = '{MY-HOST}';
+$host = '';  // TODO: Update placeholder value.
 
 // Name of the user in the instance.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
 $response = $service->users->delete($project, $instance, $host, $name);
 
@@ -1645,8 +1456,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1654,9 +1467,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1664,19 +1474,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_User();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->users->insert($project, $instance, $requestBody);
 
@@ -1692,8 +1497,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1701,9 +1508,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1711,15 +1515,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listUsers` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
-
+$instance = '';  // TODO: Update placeholder value.
 
 $response = $service->users->listUsers($project, $instance);
 
@@ -1735,8 +1535,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/sqladmin
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1744,9 +1546,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-SQLAdminSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1754,25 +1553,20 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_SQLAdmin($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Project ID of the project that contains the instance.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // Database instance ID. This does not include the project ID.
-$instance = '{MY-INSTANCE}';
+$instance = '';  // TODO: Update placeholder value.
 
 // Host of the user in the instance.
-$host = '{MY-HOST}';
+$host = '';  // TODO: Update placeholder value.
 
 // Name of the user in the instance.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_SQLAdmin_User();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->users->update($project, $instance, $host, $name, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storage.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storage.v1.json.baseline
index c03118b969..0c8265beeb 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storage.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storage.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,16 +26,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
 $service->bucketAccessControls->delete($bucket, $entity);
 ?>
@@ -49,8 +44,10 @@ $service->bucketAccessControls->delete($bucket, $entity);
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -58,9 +55,6 @@ $service->bucketAccessControls->delete($bucket, $entity);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -68,16 +62,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
 $response = $service->bucketAccessControls->get($bucket, $entity);
 
@@ -93,8 +83,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -102,9 +94,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -112,16 +101,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_BucketAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->bucketAccessControls->insert($bucket, $requestBody);
 
@@ -137,8 +121,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -146,9 +132,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -156,12 +139,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listBucketAccessControls` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
 $response = $service->bucketAccessControls->listBucketAccessControls($bucket);
 
@@ -177,8 +156,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -186,9 +167,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -196,20 +174,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Storage_BucketAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->bucketAccessControls->patch($bucket, $entity, $requestBody);
 
@@ -225,8 +199,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -234,9 +210,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -244,20 +217,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_BucketAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->bucketAccessControls->update($bucket, $entity, $requestBody);
 
@@ -273,8 +241,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -282,9 +252,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -292,12 +259,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
 $service->buckets->delete($bucket);
 ?>
@@ -310,8 +273,10 @@ $service->buckets->delete($bucket);
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -319,9 +284,6 @@ $service->buckets->delete($bucket);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -329,12 +291,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
 $response = $service->buckets->get($bucket);
 
@@ -350,8 +308,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -359,9 +319,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -369,16 +326,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // A valid API project identifier.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_Bucket();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->buckets->insert($project, $requestBody);
 
@@ -394,8 +346,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -403,9 +357,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -413,14 +364,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listBuckets` method:
-
 // A valid API project identifier.
-$project = '{MY-PROJECT}';
-
+$project = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->buckets->listBuckets($project, $optParams);
 
@@ -441,8 +388,10 @@ do {
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -450,9 +399,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -460,16 +406,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `patch` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Storage_Bucket();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->buckets->patch($bucket, $requestBody);
 
@@ -485,8 +427,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -494,9 +438,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -504,16 +445,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `update` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_Bucket();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->buckets->update($bucket, $requestBody);
 
@@ -529,8 +465,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -538,9 +476,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -548,10 +483,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_Channel();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->channels->stop($requestBody);
 ?>
@@ -564,8 +497,10 @@ $service->channels->stop($requestBody);
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -573,9 +508,6 @@ $service->channels->stop($requestBody);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -583,16 +515,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
 $service->defaultObjectAccessControls->delete($bucket, $entity);
 ?>
@@ -605,8 +533,10 @@ $service->defaultObjectAccessControls->delete($bucket, $entity);
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -614,9 +544,6 @@ $service->defaultObjectAccessControls->delete($bucket, $entity);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -624,16 +551,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
 $response = $service->defaultObjectAccessControls->get($bucket, $entity);
 
@@ -649,8 +572,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -658,9 +583,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -668,16 +590,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_ObjectAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->defaultObjectAccessControls->insert($bucket, $requestBody);
 
@@ -693,8 +610,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -702,9 +621,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -712,12 +628,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDefaultObjectAccessControls` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
 $response = $service->defaultObjectAccessControls->listDefaultObjectAccessControls($bucket);
 
@@ -733,8 +645,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -742,9 +656,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -752,20 +663,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Storage_ObjectAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->defaultObjectAccessControls->patch($bucket, $entity, $requestBody);
 
@@ -781,8 +688,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -790,9 +699,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -800,20 +706,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_ObjectAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->defaultObjectAccessControls->update($bucket, $entity, $requestBody);
 
@@ -829,8 +730,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -838,9 +741,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -848,20 +748,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
+$object = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
 $service->objectAccessControls->delete($bucket, $object, $entity);
 ?>
@@ -874,8 +770,10 @@ $service->objectAccessControls->delete($bucket, $object, $entity);
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -883,9 +781,6 @@ $service->objectAccessControls->delete($bucket, $object, $entity);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -893,20 +788,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
+$object = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
 $response = $service->objectAccessControls->get($bucket, $object, $entity);
 
@@ -922,8 +813,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -931,9 +824,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -941,20 +831,15 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
-
+$object = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_ObjectAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->objectAccessControls->insert($bucket, $object, $requestBody);
 
@@ -970,8 +855,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -979,9 +866,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -989,16 +873,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listObjectAccessControls` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
-
+$object = '';  // TODO: Update placeholder value.
 
 $response = $service->objectAccessControls->listObjectAccessControls($bucket, $object);
 
@@ -1014,8 +894,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1023,9 +905,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1033,24 +912,20 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
+$object = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Storage_ObjectAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->objectAccessControls->patch($bucket, $object, $entity, $requestBody);
 
@@ -1066,8 +941,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1075,9 +952,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1085,24 +959,19 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Name of a bucket.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
+$object = '';  // TODO: Update placeholder value.
 
 // The entity holding the permission. Can be user-userId, user-emailAddress, group-groupId,
 // group-emailAddress, allUsers, or allAuthenticatedUsers.
-$entity = '{MY-ENTITY}';
-
+$entity = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_ObjectAccessControl();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->objectAccessControls->update($bucket, $object, $entity, $requestBody);
 
@@ -1118,8 +987,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1127,9 +998,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1137,22 +1005,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `compose` method:
-
 // Name of the bucket in which to store the new object.
-$destinationBucket = '{MY-DESTINATION-BUCKET}';
+$destinationBucket = '';  // TODO: Update placeholder value.
 
 // Name of the new object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$destinationObject = '{MY-DESTINATION-OBJECT}';
-
+$destinationObject = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_ComposeRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 
 // TODO: To download media content, use:
 //
@@ -1172,8 +1035,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1181,9 +1046,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1191,31 +1053,26 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `copy` method:
-
 // Name of the bucket in which to find the source object.
-$sourceBucket = '{MY-SOURCE-BUCKET}';
+$sourceBucket = '';  // TODO: Update placeholder value.
 
-// Name of the source object. For information about how to URL encode object names to be path safe, see
-// Encoding URI Path Parts.
-$sourceObject = '{MY-SOURCE-OBJECT}';
+// Name of the source object. For information about how to URL encode object names to be path safe,
+// see Encoding URI Path Parts.
+$sourceObject = '';  // TODO: Update placeholder value.
 
-// Name of the bucket in which to store the new object. Overrides the provided object metadata's bucket
-// value, if any.For information about how to URL encode object names to be path safe, see Encoding URI
-// Path Parts.
-$destinationBucket = '{MY-DESTINATION-BUCKET}';
+// Name of the bucket in which to store the new object. Overrides the provided object metadata's
+// bucket value, if any.For information about how to URL encode object names to be path safe, see
+// Encoding URI Path Parts.
+$destinationBucket = '';  // TODO: Update placeholder value.
 
 // Name of the new object. Required when the object metadata is not otherwise provided. Overrides the
 // object metadata's name value, if any.
-$destinationObject = '{MY-DESTINATION-OBJECT}';
-
+$destinationObject = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_StorageObject();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
-$optParams = array();
+$optParams = [];
 
 // TODO: To download media content, use:
 //
@@ -1235,8 +1092,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1244,9 +1103,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1254,16 +1110,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // Name of the bucket in which the object resides.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
-
+$object = '';  // TODO: Update placeholder value.
 
 $service->objects->delete($bucket, $object);
 ?>
@@ -1276,8 +1128,10 @@ $service->objects->delete($bucket, $object);
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1285,9 +1139,6 @@ $service->objects->delete($bucket, $object);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1295,18 +1146,14 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // Name of the bucket in which the object resides.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
-
+$object = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 
 // TODO: To download media content, use:
 //
@@ -1326,8 +1173,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1335,9 +1184,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1345,22 +1191,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
+// Name of the bucket in which to store the new object. Overrides the provided object metadata's
+// bucket value, if any.
+$bucket = '';  // TODO: Update placeholder value.
 
-// TODO: Change placeholder below to desired parameter value for the `insert` method:
-
-// Name of the bucket in which to store the new object. Overrides the provided object metadata's bucket
-// value, if any.
-$bucket = '{MY-BUCKET}';
-
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_StorageObject();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 // TODO: Add desired media content for upload. For more information, see:
 // https://developers.google.com/api-client-library/php/guide/media_upload
 
-
 $response = $service->objects->insert($bucket, $requestBody);
 
 // TODO: Change code below to process the `response` object:
@@ -1375,8 +1215,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1384,9 +1226,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1394,20 +1233,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listObjects` method:
-
 // Name of the bucket in which to look for objects.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->objects->listObjects($bucket, $optParams);
 
-  foreach ($response['items'] as $object) {
-    // TODO: Change code below to process each `object` resource:
-    echo '<pre>', var_export($object, true), '</pre>', "\n";
+  foreach ($response['items'] as $storageObject) {
+    // TODO: Change code below to process each `storageObject` resource:
+    echo '<pre>', var_export($storageObject, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -1422,8 +1257,10 @@ do {
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1431,9 +1268,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1441,20 +1275,16 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // Name of the bucket in which the object resides.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
-
+$object = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Storage_StorageObject();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->objects->patch($bucket, $object, $requestBody);
 
@@ -1470,8 +1300,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1479,9 +1311,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1489,29 +1318,24 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `rewrite` method:
-
 // Name of the bucket in which to find the source object.
-$sourceBucket = '{MY-SOURCE-BUCKET}';
+$sourceBucket = '';  // TODO: Update placeholder value.
 
-// Name of the source object. For information about how to URL encode object names to be path safe, see
-// Encoding URI Path Parts.
-$sourceObject = '{MY-SOURCE-OBJECT}';
+// Name of the source object. For information about how to URL encode object names to be path safe,
+// see Encoding URI Path Parts.
+$sourceObject = '';  // TODO: Update placeholder value.
 
-// Name of the bucket in which to store the new object. Overrides the provided object metadata's bucket
-// value, if any.
-$destinationBucket = '{MY-DESTINATION-BUCKET}';
+// Name of the bucket in which to store the new object. Overrides the provided object metadata's
+// bucket value, if any.
+$destinationBucket = '';  // TODO: Update placeholder value.
 
 // Name of the new object. Required when the object metadata is not otherwise provided. Overrides the
 // object metadata's name value, if any. For information about how to URL encode object names to be
 // path safe, see Encoding URI Path Parts.
-$destinationObject = '{MY-DESTINATION-OBJECT}';
-
+$destinationObject = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_StorageObject();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->objects->rewrite($sourceBucket, $sourceObject, $destinationBucket, $destinationObject, $requestBody);
 
@@ -1527,8 +1351,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1536,9 +1362,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1546,22 +1369,17 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // Name of the bucket in which the object resides.
-$bucket = '{MY-BUCKET}';
+$bucket = '';  // TODO: Update placeholder value.
 
 // Name of the object. For information about how to URL encode object names to be path safe, see
 // Encoding URI Path Parts.
-$object = '{MY-OBJECT}';
-
+$object = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_StorageObject();
-// TODO: Assign values to desired properties of the `requestBody` object.
 
-
-$optParams = array();
+$optParams = [];
 
 // TODO: To download media content, use:
 //
@@ -1581,8 +1399,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storage
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -1590,9 +1410,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StorageSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -1600,16 +1417,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storage($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `watchAll` method:
-
 // Name of the bucket in which to look for objects.
-$bucket = '{MY-BUCKET}';
-
+$bucket = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storage_Channel();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->objects->watchAll($bucket, $requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storagetransfer.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storagetransfer.v1.json.baseline
index 84829efcf7..4ed1fa7230 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storagetransfer.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_storagetransfer.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,7 +26,6 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
 $response = $service->v1->getGoogleServiceAccount();
 
 // TODO: Change code below to process the `response` object:
@@ -42,8 +40,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -51,9 +51,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -61,13 +58,9 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The ID of the Google Developers Console project that the Google service account is associated with.
 // Required.
-$projectId = '{MY-PROJECT-ID}';
-
+$projectId = '';  // TODO: Update placeholder value.
 
 $response = $service->googleServiceAccounts->get($projectId);
 
@@ -83,8 +76,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -92,9 +87,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -102,10 +94,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storagetransfer_TransferJob();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->transferJobs->create($requestBody);
 
@@ -121,8 +111,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -130,9 +122,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -140,12 +129,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The job to get. Required.
-$jobName = '{MY-JOB-NAME}';
-
+$jobName = '';  // TODO: Update placeholder value.
 
 $response = $service->transferJobs->get($jobName);
 
@@ -161,8 +146,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -170,9 +157,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -180,14 +164,13 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->transferJobs->listTransferJobs($optParams);
 
-  foreach ($response['transferJobs'] as $transfer_job) {
-    // TODO: Change code below to process each `transfer_job` resource:
-    echo '<pre>', var_export($transfer_job, true), '</pre>', "\n";
+  foreach ($response['transferJobs'] as $transferJob) {
+    // TODO: Change code below to process each `transferJob` resource:
+    echo '<pre>', var_export($transferJob, true), '</pre>', "\n";
   }
 
   $optParams['pageToken'] = $response->getNextPageToken();
@@ -202,8 +185,10 @@ do {
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -211,9 +196,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -221,16 +203,12 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `patch` method:
-
 // The name of job to update. Required.
-$jobName = '{MY-JOB-NAME}';
-
+$jobName = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Storagetransfer_UpdateTransferJobRequest();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->transferJobs->patch($jobName, $requestBody);
 
@@ -246,8 +224,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -255,9 +235,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -265,12 +242,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `cancel` method:
-
 // The name of the operation resource to be cancelled.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
 $service->transferOperations->cancel($name);
 ?>
@@ -283,8 +256,10 @@ $service->transferOperations->cancel($name);
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -292,9 +267,6 @@ $service->transferOperations->cancel($name);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -302,12 +274,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `delete` method:
-
 // The name of the operation resource to be deleted.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
 $service->transferOperations->delete($name);
 ?>
@@ -320,8 +288,10 @@ $service->transferOperations->delete($name);
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -329,9 +299,6 @@ $service->transferOperations->delete($name);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -339,12 +306,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `get` method:
-
 // The name of the operation resource.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
 $response = $service->transferOperations->get($name);
 
@@ -360,8 +323,10 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -369,9 +334,6 @@ echo '<pre>', var_export($response, true), '</pre>', "\n";
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -379,14 +341,10 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listTransferOperations` method:
-
 // The value `transferOperations`.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
-$optParams = array();
+$optParams = [];
 do {
   $response = $service->transferOperations->listTransferOperations($name, $optParams);
 
@@ -407,8 +365,10 @@ do {
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -416,9 +376,6 @@ do {
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -426,16 +383,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `pause` method:
-
 // The name of the transfer operation. Required.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storagetransfer_PauseTransferOperationRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->transferOperations->pause($name, $requestBody);
 ?>
@@ -448,8 +400,10 @@ $service->transferOperations->pause($name, $requestBody);
  *    https://console.developers.google.com/apis/api/storagetransfer
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -457,9 +411,6 @@ $service->transferOperations->pause($name, $requestBody);
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-StoragetransferSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -467,16 +418,11 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Storagetransfer($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `resume` method:
-
 // The name of the transfer operation. Required.
-$name = '{MY-NAME}';
-
+$name = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Storagetransfer_ResumeTransferOperationRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $service->transferOperations->resume($name, $requestBody);
 ?>
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_taskqueue.v1beta2.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_taskqueue.v1beta2.json.baseline
index 360cf703e9..f6078893a1 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_taskqueue.v1beta2.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_taskqueue.v1beta2.json.baseline
@@ -17,15 +17,11 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The id of the taskqueue to get the properties of.
-$taskqueue = '{MY-TASKQUEUE}';
-
+$taskqueue = '';  // TODO: Update placeholder value.
 
 $response = $service->taskqueues->get($project, $taskqueue);
 
@@ -33,10 +29,10 @@ $response = $service->taskqueues->get($project, $taskqueue);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -60,26 +56,22 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `delete` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The taskqueue to delete a task from.
-$taskqueue = '{MY-TASKQUEUE}';
+$taskqueue = '';  // TODO: Update placeholder value.
 
 // The id of the task to delete.
-$task = '{MY-TASK}';
-
+$task = '';  // TODO: Update placeholder value.
 
 $service->tasks->delete($project, $taskqueue, $task);
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `delete` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -103,18 +95,14 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `get` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The taskqueue in which the task belongs.
-$taskqueue = '{MY-TASKQUEUE}';
+$taskqueue = '';  // TODO: Update placeholder value.
 
 // The task to get properties of.
-$task = '{MY-TASK}';
-
+$task = '';  // TODO: Update placeholder value.
 
 $response = $service->tasks->get($project, $taskqueue, $task);
 
@@ -122,10 +110,10 @@ $response = $service->tasks->get($project, $taskqueue, $task);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `get` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -149,19 +137,14 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `insert` method:
-
 // The project under which the queue lies
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The taskqueue to insert the task into
-$taskqueue = '{MY-TASKQUEUE}';
-
+$taskqueue = '';  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Taskqueue_Task();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->tasks->insert($project, $taskqueue, $requestBody);
 
@@ -169,10 +152,10 @@ $response = $service->tasks->insert($project, $taskqueue, $requestBody);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `insert` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -196,21 +179,17 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `lease` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The taskqueue to lease a task from.
-$taskqueue = '{MY-TASKQUEUE}';
+$taskqueue = '';  // TODO: Update placeholder value.
 
 // The number of tasks to lease.
-$numTasks = 0;
+$numTasks = 0;  // TODO: Update placeholder value.
 
 // The lease in seconds.
-$leaseSecs = 0;
-
+$leaseSecs = 0;  // TODO: Update placeholder value.
 
 $response = $service->tasks->lease($project, $taskqueue, $numTasks, $leaseSecs);
 
@@ -218,10 +197,10 @@ $response = $service->tasks->lease($project, $taskqueue, $numTasks, $leaseSecs);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `lease` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -245,15 +224,11 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTasks` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
 // The id of the taskqueue to list tasks from.
-$taskqueue = '{MY-TASKQUEUE}';
-
+$taskqueue = '';  // TODO: Update placeholder value.
 
 $response = $service->tasks->listTasks($project, $taskqueue);
 
@@ -261,10 +236,10 @@ $response = $service->tasks->listTasks($project, $taskqueue);
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `listTasks` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -288,25 +263,19 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `patch` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-// taskqueue
-$taskqueue = '{MY-TASKQUEUE}';
+$taskqueue = '';  // TODO: Update placeholder value.
 
-// task
-$task = '{MY-TASK}';
+$task = '';  // TODO: Update placeholder value.
 
 // The new lease in seconds.
-$newLeaseSeconds = 0;
-
+$newLeaseSeconds = 0;  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`. Only assigned
+// properties will be changed:
 $requestBody = new Google_Service_Taskqueue_Task();
-// TODO: Assign values to desired properties of the `requestBody` object to be changed.
-
 
 $response = $service->tasks->patch($project, $taskqueue, $task, $newLeaseSeconds, $requestBody);
 
@@ -314,10 +283,10 @@ $response = $service->tasks->patch($project, $taskqueue, $task, $newLeaseSeconds
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `patch` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
@@ -341,25 +310,18 @@ $client = getClient();
 
 $service = new Google_Service_Taskqueue($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `update` method:
-
 // The project under which the queue lies.
-$project = '{MY-PROJECT}';
+$project = '';  // TODO: Update placeholder value.
 
-// taskqueue
-$taskqueue = '{MY-TASKQUEUE}';
+$taskqueue = '';  // TODO: Update placeholder value.
 
-// task
-$task = '{MY-TASK}';
+$task = '';  // TODO: Update placeholder value.
 
 // The new lease in seconds.
-$newLeaseSeconds = 0;
-
+$newLeaseSeconds = 0;  // TODO: Update placeholder value.
 
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Taskqueue_Task();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->tasks->update($project, $taskqueue, $task, $newLeaseSeconds, $requestBody);
 
@@ -367,10 +329,10 @@ $response = $service->tasks->update($project, $taskqueue, $task, $newLeaseSecond
 echo '<pre>', var_export($response, true), '</pre>', "\n";
 
 function getClient() {
-  // TODO: Change placeholder below to get authentication credentials.
-  // See: https://foo.com/bar
+  // TODO: Change placeholder below to generate authentication credentials. See:
+  // https://foo.com/bar
   //
-  // To use the `update` method, authorize using one of the following scopes:
+  // Authorize using one of the following scopes:
   //   https://www.googleapis.com/auth/taskqueue
   //   https://www.googleapis.com/auth/taskqueue.consumer
   return null;
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_translate.v2.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_translate.v2.json.baseline
index 890c4264a4..cef7d51fba 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_translate.v2.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_translate.v2.json.baseline
@@ -15,18 +15,12 @@ require_once __DIR__ . '/vendor/autoload.php';
 
 $client = new Google_Client();
 $client->setApplicationName('Google-TranslateSample/0.1');
-
-// TODO: Change placeholder below to desired API key:
-$client->setDeveloperKey('{MY-API-KEY}');
+$client->setDeveloperKey('');  // TODO: Update placeholder with desired API key.
 
 $service = new Google_Service_Translate($client);
 
-
-// TODO: Change placeholder below to desired parameter value for the `listDetections` method:
-
 // The text to detect
-$q = [];
-
+$q = [];  // TODO: Update placeholder value.
 
 $response = $service->detections->listDetections($q);
 
@@ -49,13 +43,10 @@ require_once __DIR__ . '/vendor/autoload.php';
 
 $client = new Google_Client();
 $client->setApplicationName('Google-TranslateSample/0.1');
-
-// TODO: Change placeholder below to desired API key:
-$client->setDeveloperKey('{MY-API-KEY}');
+$client->setDeveloperKey('');  // TODO: Update placeholder with desired API key.
 
 $service = new Google_Service_Translate($client);
 
-
 $response = $service->languages->listLanguages();
 
 // TODO: Change code below to process the `response` object:
@@ -77,21 +68,15 @@ require_once __DIR__ . '/vendor/autoload.php';
 
 $client = new Google_Client();
 $client->setApplicationName('Google-TranslateSample/0.1');
-
-// TODO: Change placeholder below to desired API key:
-$client->setDeveloperKey('{MY-API-KEY}');
+$client->setDeveloperKey('');  // TODO: Update placeholder with desired API key.
 
 $service = new Google_Service_Translate($client);
 
-
-// TODO: Change placeholders below to desired parameter values for the `listTranslations` method:
-
 // The text to translate
-$q = [];
+$q = [];  // TODO: Update placeholder value.
 
 // The target language into which the text should be translated
-$target = '{MY-TARGET}';
-
+$target = '';  // TODO: Update placeholder value.
 
 $response = $service->translations->listTranslations($q, $target);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_vision.v1.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_vision.v1.json.baseline
index 86d292d114..e4e4f11504 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_vision.v1.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/php/php_vision.v1.json.baseline
@@ -8,8 +8,10 @@
  *    https://console.developers.google.com/apis/api/vision
  * 2. This sample uses Application Default Credentials for authentication.
  *    If not already done, install the gcloud CLI from
- *    https://cloud.google.com/sdk/ and run
+ *    https://cloud.google.com/sdk and run
  *    `gcloud beta auth application-default login`
+ *    For more information, see:
+ *    https://developers.google.com/identity/protocols/application-default-credentials
  * 3. Install the PHP client library with Composer. Check installation
  *    instructions at https://github.com/google/google-api-php-client.
  */
@@ -17,9 +19,6 @@
 // Autoload Composer.
 require_once __DIR__ . '/vendor/autoload.php';
 
-// Use Application Default Credentials for authentication when running locally.
-// For more information, see:
-// https://developers.google.com/identity/protocols/application-default-credentials
 $client = new Google_Client();
 $client->setApplicationName('Google-VisionSample/0.1');
 $client->useApplicationDefaultCredentials();
@@ -27,10 +26,8 @@ $client->addScope('https://www.googleapis.com/auth/cloud-platform');
 
 $service = new Google_Service_Vision($client);
 
-
+// TODO: Assign values to desired properties of `requestBody`:
 $requestBody = new Google_Service_Vision_BatchAnnotateImagesRequest();
-// TODO: Assign values to desired properties of the `requestBody` object.
-
 
 $response = $service->images->annotate($requestBody);
 
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/ruby/ruby_sqladmin.v1beta4.json.baseline b/src/test/java/com/google/api/codegen/testdata/discoveries/ruby/ruby_sqladmin.v1beta4.json.baseline
index 70a45eb990..695e012383 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/ruby/ruby_sqladmin.v1beta4.json.baseline
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/ruby/ruby_sqladmin.v1beta4.json.baseline
@@ -1361,14 +1361,10 @@ project = ''  # TODO: Update placeholder value.
 # Database instance ID. This does not include the project ID.
 instance = ''  # TODO: Update placeholder value.
 
-items = service.fetch_all(items: :items) do |token|
-  service.list_users(project, instance, page_token: token)
-end
+response = service.list_users(project, instance)
 
-items.each do |user|
-  # TODO: Change code below to process each `user` resource:
-  puts JSON.pretty_generate(user)
-end
+# TODO: Change code below to process the `response` object:
+puts JSON.pretty_generate(response)
 # BEFORE RUNNING:
 # ---------------
 # 1. If not already done, enable the Cloud SQL Administration API
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/sqladmin.v1beta4.json.overrides b/src/test/java/com/google/api/codegen/testdata/discoveries/sqladmin.v1beta4.json.overrides
index 7bb1352870..5afae5c005 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/sqladmin.v1beta4.json.overrides
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/sqladmin.v1beta4.json.overrides
@@ -25,6 +25,18 @@
     }
   },
   "ruby": {
-    "apiTypeName": "SQLAdminService"
+    "apiTypeName": "SQLAdminService",
+    "methods": {
+      "sql.users.list": {
+        "isPageStreaming": false
+      }
+    }
+  },
+  "php": {
+    "methods": {
+      "sql.users.list": {
+        "isPageStreaming": false
+      }
+    }
   }
 }
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/storage.v1.json.overrides b/src/test/java/com/google/api/codegen/testdata/discoveries/storage.v1.json.overrides
index 5ad79e3cdf..837473b101 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/storage.v1.json.overrides
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/storage.v1.json.overrides
@@ -80,5 +80,87 @@
         }
       }
     }
+  },
+  "php": {
+    "methods": {
+      "storage.objects.patch": {
+        "requestBodyType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        },
+        "responseType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      },
+      "storage.objects.get": {
+        "responseType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      },
+      "storage.objects.insert": {
+        "requestBodyType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        },
+        "responseType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      },
+      "storage.objects.list": {
+        "pageStreamingResourceField": {
+          "type": {
+            "message": {
+              "typeName": "StorageObject"
+            }
+          }
+        }
+      },
+      "storage.objects.rewrite": {
+        "requestBodyType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      },
+      "storage.objects.update": {
+        "requestBodyType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        },
+        "responseType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      },
+      "storage.objects.compose": {
+        "responseType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      },
+      "storage.objects.copy": {
+        "requestBodyType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        },
+        "responseType": {
+          "message": {
+            "typeName": "StorageObject"
+          }
+        }
+      }
+    }
   }
 }
diff --git a/src/test/java/com/google/api/codegen/testdata/discoveries/storagetransfer.v1.json.overrides b/src/test/java/com/google/api/codegen/testdata/discoveries/storagetransfer.v1.json.overrides
index 2d99c24d9a..a72af9210d 100644
--- a/src/test/java/com/google/api/codegen/testdata/discoveries/storagetransfer.v1.json.overrides
+++ b/src/test/java/com/google/api/codegen/testdata/discoveries/storagetransfer.v1.json.overrides
@@ -10,26 +10,20 @@
     "packagePrefix": "com.google.api.services.storagetransfer.v1",
     "methods": {
       "storagetransfer.getGoogleServiceAccount": {
-        "nameComponents": ["googleServiceAccounts", "get"],
-        "fields": {
-          "projectId": {
-            "name": "projectId",
-            "type": {
-              "kind": "TYPE_STRING",
-              "isMap": false,
-              "isArray": false,
-              "isMessage": false
-            },
-            "example": "",
-            "description": "The ID of the Google Developers Console project that the Google service account is associated with. Required."
-          }
-        },
+        "nameComponents": ["v1", "getGoogleServiceAccount"],
         "requestType": {
           "message": {
-            "typeName": "GoogleServiceAccounts.Get"
+            "typeName": "V1.GetGoogleServiceAccount"
           }
         }
       }
     }
+  },
+  "php": {
+    "methods": {
+      "storagetransfer.getGoogleServiceAccount": {
+        "nameComponents": ["v1", "getGoogleServiceAccount"]
+      }
+    }
   }
 }