Enable PHPStan strict rules

composer.json

@@ -40,7 +40,8 @@
     "require-dev": {
         "doctrine/coding-standard": "^6.0",
         "jetbrains/phpstorm-stubs": "^2019.1",
-        "phpstan/phpstan": "^0.12",
+        "phpstan/phpstan": "^0.12.18",
+        "phpstan/phpstan-strict-rules": "^0.12.2",
         "phpunit/phpunit": "^9.0",
         "symfony/console": "^2.0.5|^3.0|^4.0|^5.0"
     },

phpstan.neon.dist

@@ -4,6 +4,7 @@ parameters:
         - %currentWorkingDirectory%/src
     autoload_files:
         - %currentWorkingDirectory%/tests/phpstan-polyfill.php
+    treatPhpDocTypesAsCertain: false
     reportUnmatchedIgnoredErrors: false
     checkMissingIterableValueType: false
     checkGenericClassInNonGenericObjectType: false
@@ -72,3 +73,48 @@ parameters:
         -
             message: '~^Cannot cast array<string>\|bool\|string\|null to int\.$~'
             path: %currentWorkingDirectory%/src/Tools/Console/Command/RunSqlCommand.php
+
+        # https://github.com/phpstan/phpstan/issues/3134
+        -
+            message: '~^Call to static method PHPUnit\\Framework\\Assert::assertSame\(\) with Doctrine\\DBAL\\Types\\Type and Doctrine\\DBAL\\Types\\Type will always evaluate to true\.$~'
+            path: %currentWorkingDirectory%/tests/Types/TypeRegistryTest.php
+
+        # https://github.com/phpstan/phpstan-strict-rules/issues/103
+        -
+            message: '~^Construct empty\(\) is not allowed. Use more strict comparison\.~'
+            paths:
+                - %currentWorkingDirectory%/src/Driver/*/*Connection.php
+                - %currentWorkingDirectory%/src/Driver/*/Driver.php
+                - %currentWorkingDirectory%/src/Driver/AbstractOracleDriver/EasyConnectString.php
+                - %currentWorkingDirectory%/src/Platforms/*Platform.php
+                - %currentWorkingDirectory%/src/Schema/*SchemaManager.php
+
+        # In some namespaces, we use array<string,mixed>, some elements of which are actually boolean
+        -
+            message: '~^Only booleans are allowed in .*, mixed given~'
+            paths:
+                - %currentWorkingDirectory%/src/Driver/*/Driver.php
+                - %currentWorkingDirectory%/src/Platforms/*Platform.php
+                - %currentWorkingDirectory%/src/Query/QueryBuilder.php
+                - %currentWorkingDirectory%/src/Schema/*SchemaManager.php
+
+        # FetchMode::CUSTOM_OBJECT requires variable property access
+        -
+            message: '~^Variable property access on object\.~'
+            paths:
+                - %currentWorkingDirectory%/src/Driver/*/*Statement.php
+
+        # Some APIs use variable method calls internally
+        -
+            message: '~^Variable method call on .*~'
+            paths:
+                - %currentWorkingDirectory%/src/Schema/AbstractSchemaManager.php
+                - %currentWorkingDirectory%/src/Schema/Column.php
+
+        # https://github.com/phpstan/phpstan/issues/3146
+        -
+            message: '~^Only numeric types are allowed in -, int<1, max>\|false given on the left side\.~'
+            paths:
+                - %currentWorkingDirectory%/src/Platforms/SQLServer2012Platform.php
+includes:
+    - vendor/phpstan/phpstan-strict-rules/rules.neon

src/Cache/ArrayStatement.php

@@ -32,7 +32,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     public function __construct(array $data)
     {
         $this->data = $data;
-        if (! count($data)) {
+        if (count($data) === 0) {
             return;
         }
 
@@ -91,7 +91,7 @@ public function fetch($fetchMode = null, ...$args)
         }
 
         $row       = $this->data[$this->num++];
-        $fetchMode = $fetchMode ?: $this->defaultFetchMode;
+        $fetchMode = $fetchMode ?? $this->defaultFetchMode;
 
         if ($fetchMode === FetchMode::ASSOCIATIVE) {
             return $row;

src/Cache/ResultCacheStatement.php

@@ -82,7 +82,7 @@ public function closeCursor()
         }
 
         $data = $this->resultCache->fetch($this->cacheKey);
-        if (! $data) {
+        if ($data === false) {
             $data = [];
         }
         $data[$this->realKey] = $this->data;
@@ -132,10 +132,10 @@ public function fetch($fetchMode = null, ...$args)
 
         $row = $this->statement->fetch(FetchMode::ASSOCIATIVE);
 
-        if ($row) {
+        if ($row !== false) {
             $this->data[] = $row;
 
-            $fetchMode = $fetchMode ?: $this->defaultFetchMode;
+            $fetchMode = $fetchMode ?? $this->defaultFetchMode;
 
             if ($fetchMode === FetchMode::ASSOCIATIVE) {
                 return $row;

src/Configuration.php

@@ -72,14 +72,14 @@ public function setResultCacheImpl(Cache $cacheImpl)
      *
      * @deprecated Use Configuration::setSchemaAssetsFilter() instead
      *
-     * @param string $filterExpression
+     * @param string|null $filterExpression
      *
      * @return void
      */
     public function setFilterSchemaAssetsExpression($filterExpression)
     {
         $this->_attributes['filterSchemaAssetsExpression'] = $filterExpression;
-        if ($filterExpression) {
+        if ($filterExpression !== null) {
             $this->_attributes['filterSchemaAssetsExpressionCallable'] = $this->buildSchemaAssetsFilterFromExpression($filterExpression);
         } else {
             $this->_attributes['filterSchemaAssetsExpressionCallable'] = null;