Issue #148 Support multi value fields

src/XfdfFile.php

@@ -9,6 +9,42 @@
  * This class represents a temporary XFDF file that can be used to fill a PDF
  * form with valid unicode characters.
  *
+ * Form data must be passed to the constructor as an array in this form:
+ *
+ * ```
+ * [
+ *     // Field name => field value
+ *     'Firstname' => 'John',
+ *
+ *     // Hierarchical/nested fields in dot notation
+ *     'Address.Street' => 'Some Street',
+ *     'Address.City' => 'Any City',
+ *
+ *     // Multi value fields
+ *     'Pets' => ['Cat', 'Mouse'],
+ * ]
+ * ```
+ *
+ * This will result in the following XML structure (header/footer omitted):
+ *
+ * ```
+ * <field name="Firstname">
+ *   <Value>John</Value>
+ * </field>
+ * <field name="Address">
+ *   <field name="Street">
+ *     <Value>Some Street</Value>
+ *   </field>
+ *   <field name="City">
+ *     <Value>Any City</Value>
+ *   </field>
+ * </field>
+ * <field name="Pets">
+ *   <Value>Cat</Value>
+ *   <Value>Mouse</Value>
+ * </field>
+ * ```
+ *
  * @author Tomas Holy <[email protected]>
  * @author Michael Härtl <[email protected]>
  * @license http://www.opensource.org/licenses/MIT
@@ -20,20 +56,23 @@ class XfdfFile extends File
 <?xml version="1.0" encoding="UTF-8"?>
 <xfdf xmlns="http://ns.adobe.com/xfdf/" xml:space="preserve">
 <fields>
+
 FDF;
 
     // XFDF file footer
     const XFDF_FOOTER = <<<FDF
 </fields>
 </xfdf>
+
 FDF;
 
     /**
      * Constructor
      *
+     *
      * @param array $data the form data as name => value
      * @param string|null $suffix the optional suffix for the tmp file
-     * @param string|null $suffix the optional prefix for the tmp file. If null
+     * @param string|null $prefix the optional prefix for the tmp file. If null
      * 'php_tmpfile_' is used.
      * @param string|null $directory directory where the file should be
      * created. Autodetected if not provided.
@@ -142,11 +181,18 @@ protected function writeFields($fp, $fields)
         foreach ($fields as $key => $value) {
             $key = $this->xmlEncode($key);
             fwrite($fp, "<field name=\"$key\">\n");
-            if (is_array($value)) {
-                $this->writeFields($fp, $value);
+            if (!is_array($value)) {
+                $value = array($value);
+            }
+            if (isset($value[0])) {
+                // Numeric keys: single or multi-value field
+                foreach($value as $val) {
+                    $val = $this->xmlEncode($val);
+                    fwrite($fp, "<value>$val</value>\n");
+                }
             } else {
-                $value = $this->xmlEncode($value);
-                fwrite($fp, "<value>$value</value>\n");
+                // String keys: nested/hierarchical fields
+                $this->writeFields($fp, $value);
             }
             fwrite($fp, "</field>\n");
         }

tests/XfdfFileTest.php

@@ -16,12 +16,15 @@ public function testXfdfFileCreation()
             'checkbox 2' => 0,
             'radio 1' => 2,
             'address.street' => 'some street',
-            "umlauts-in-value" => "öäüÖÄÜ",
+            "umlauts-in-value" => 'öäüÖÄÜ',
             'some.other.value' => 'val1',
             'some.other.value2' => 'val2',
-            "öäüÖÄÜ" => "umlauts in key",
-            "special-in-value" => "ۧ&()",
-            "€ key" => "special in key",
+            'öäüÖÄÜ' => "umlauts in key",
+            'special-in-value' => 'ۧ&()',
+            '€ key' => 'special in key',
+            'multivalue1' => array('val1', 'val2'),
+            'nested.dummy' => 'valX',
+            'nested.multivalue2' => array('val3', 'val4'),
         );
 
         $oXfdfFile = new XfdfFile($data, null, null, __DIR__);

tests/files/XfdfFileTest.xfdf

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <xfdf xmlns="http://ns.adobe.com/xfdf/" xml:space="preserve">
-<fields><field name="name">
+<fields>
+<field name="name">
 <value>Jürgen čárka čČćĆđĐ мирано</value>
 </field>
 <field name="email">
@@ -45,5 +46,18 @@
 <field name="€ key">
 <value>special in key</value>
 </field>
+<field name="multivalue1">
+<value>val1</value>
+<value>val2</value>
+</field>
+<field name="nested">
+<field name="dummy">
+<value>valX</value>
+</field>
+<field name="multivalue2">
+<value>val3</value>
+<value>val4</value>
+</field>
+</field>
 </fields>
-</xfdf>
+</xfdf>