[PHP] Use parent constructor when inheriting

modules/swagger-codegen/src/main/resources/php/model.mustache

@@ -114,6 +114,7 @@ class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}implements ArrayA
      */
     public function __construct(array $data = null)
     {
+        {{#parent}}parent::__construct($data);{{/parent}}
         if ($data != null) {
             {{#vars}}$this->{{name}} = $data["{{name}}"];{{#hasMore}}
             {{/hasMore}}{{/vars}}

modules/swagger-codegen/src/test/resources/2_0/petstore.json

@@ -1339,6 +1339,42 @@
       "xml": {
         "name": "Name"
       }
+    },
+    "Dog" : {
+      "allOf" : [ {
+        "$ref" : "#/definitions/Animal"
+      }, {
+        "type" : "object",
+        "properties" : {
+          "breed" : {
+            "type" : "string"
+          }
+        }
+      } ]
+    },
+    "Cat" : {
+      "allOf" : [ {
+        "$ref" : "#/definitions/Animal"
+      }, {
+        "type" : "object",
+        "properties" : {
+          "declawed" : {
+            "type" : "boolean"
+          }
+        }
+      } ]
+    },
+    "Animal" : {
+      "type" : "object",
+      "discriminator": "className",
+      "required": [
+        "className"
+      ],
+      "properties" : {
+        "className" : {
+          "type" : "string"
+        }
+      }
     }
   }
 }

samples/client/petstore/php/SwaggerClient-php/tests/PetApiTest.php

@@ -375,6 +375,33 @@ class PetApiTest extends \PHPUnit_Framework_TestCase
 
     }
 
+    // test inheritance in the model
+    public function testInheritance()
+    {
+        $new_dog = new Swagger\Client\Model\Dog;
+        // the object should be an instance of the derived class
+        $this->assertInstanceOf('Swagger\Client\Model\Dog', $new_dog);
+        // the object should also be an instance of the parent class
+        $this->assertInstanceOf('Swagger\Client\Model\Animal', $new_dog);
+    }
+
+    // test inheritance constructor is working with data
+    // initialization
+    public function testInheritanceConstructorDataInitialization()
+    {
+        // initialize the object with data in the constructor
+        $data = array(
+            'class_name' => 'Dog',
+            'breed' => 'Great Dane'
+        );
+        $new_dog = new Swagger\Client\Model\Dog($data);
+
+        // the property on the derived class should be set
+        $this->assertSame('Great Dane', $new_dog->getBreed());
+        // the property on the parent class should be set
+        $this->assertSame('Dog', $new_dog->getClassName());
+    }
+
 }
 
 ?>