diff --git a/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/languages/PhpClientCodegen.java b/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/languages/PhpClientCodegen.java
index 2f86153bfb7..734e1612849 100644
--- a/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/languages/PhpClientCodegen.java
+++ b/modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/languages/PhpClientCodegen.java
@@ -27,7 +27,14 @@ public class PhpClientCodegen extends DefaultCodegen implements CodegenConfig {
 
   public PhpClientCodegen() {
     super();
-    modelPackage = "models";
+
+    //TODO determine hte package name from host name
+    invokerPackage = camelize("SwaggerPetstore"); 
+
+    String packagePath = invokerPackage + "-php";
+
+    modelPackage = packagePath + "/lib/models";
+    apiPackage = packagePath + "/lib";
     outputFolder = "generated-code/php";
     modelTemplateFiles.put("model.mustache", ".php");
     apiTemplateFiles.put("api.mustache", ".php");
@@ -59,7 +66,10 @@ public class PhpClientCodegen extends DefaultCodegen implements CodegenConfig {
     typeMapping.put("List", "array");
     typeMapping.put("map", "map");
 
-    supportingFiles.add(new SupportingFile("Swagger.mustache", "", "Swagger.php"));
+    supportingFiles.add(new SupportingFile("composer.mustache", packagePath, "composer.json"));
+    supportingFiles.add(new SupportingFile("APIClient.mustache", packagePath + "/lib", "APIClient.php"));
+    supportingFiles.add(new SupportingFile("APIClientException.mustache", packagePath + "/lib", "APIClientException.php"));
+    supportingFiles.add(new SupportingFile("require.mustache", packagePath, invokerPackage + ".php"));
   }
 
   @Override
diff --git a/modules/swagger-codegen/src/main/resources/php/Swagger.mustache b/modules/swagger-codegen/src/main/resources/php/APIClient.mustache
similarity index 89%
rename from modules/swagger-codegen/src/main/resources/php/Swagger.mustache
rename to modules/swagger-codegen/src/main/resources/php/APIClient.mustache
index 3d6b77d819e..4e60cf6d338 100644
--- a/modules/swagger-codegen/src/main/resources/php/Swagger.mustache
+++ b/modules/swagger-codegen/src/main/resources/php/APIClient.mustache
@@ -15,24 +15,11 @@
  *  limitations under the License.
  */
 
-/* Autoload the model definition files */
-/**
- *
- * @param string $className the class to attempt to load
- */
-function swagger_autoloader($className) {
-  $currentDir = dirname(__FILE__);
-  if (file_exists($currentDir . '/' . $className . '.php')) {
-    include $currentDir . '/' . $className . '.php';
-  } elseif (file_exists($currentDir . '/models/' . $className . '.php')) {
-    include $currentDir . '/models/' . $className . '.php';
-  }
-}
-spl_autoload_register('swagger_autoloader');
-
+namespace {{invokerPackage}};
 
 class APIClient {
 
+  public static $PATCH = "PATCH";
   public static $POST = "POST";
   public static $GET = "GET";
   public static $PUT = "PUT";
@@ -199,7 +186,7 @@ class APIClient {
    * @return string the serialized object
    */
   public static function toPathValue($value) {
-      return rawurlencode(toString($value));
+      return rawurlencode(self::toString($value));
   }
 
   /**
@@ -214,7 +201,7 @@ class APIClient {
         if (is_array($object)) {
             return implode(',', $object);
         } else {
-            return toString($object);
+            return self::toString($object);
         }
   }
 
@@ -226,7 +213,7 @@ class APIClient {
    * @return string the header string
    */
   public static function toHeaderValue($value) {
-      return toString($value);
+      return self::toString($value);
   }
 
   /**
@@ -237,7 +224,7 @@ class APIClient {
    * @return string the form string
    */
   public static function toFormValue($value) {
-      return toString($value);
+      return self::toString($value);
   }
 
   /**
@@ -292,6 +279,7 @@ class APIClient {
       settype($data, $class);
       $deserialized = $data;
     } else {
+      $class = "{{invokerPackage}}\\models\\".$class;
       $instance = new $class();
       foreach ($instance::$swaggerTypes as $property => $type) {
         if (isset($data->$property)) {
@@ -307,20 +295,3 @@ class APIClient {
 
 }
 
-class APIClientException extends Exception {
-  protected $response, $response_info;
-
-  public function __construct($message="", $code=0, $response_info=null, $response=null) {
-    parent::__construct($message, $code);
-    $this->response_info = $response_info;
-    $this->response = $response;
-  }
-
-  public function getResponse() {
-    return $this->response;
-  }
-
-  public function getResponseInfo() {
-    return $this->response_info;
-  }
-}
diff --git a/modules/swagger-codegen/src/main/resources/php/APIClientException.mustache b/modules/swagger-codegen/src/main/resources/php/APIClientException.mustache
new file mode 100644
index 00000000000..3cf74d69288
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/php/APIClientException.mustache
@@ -0,0 +1,38 @@
+<?php
+/**
+ *  Copyright 2015 Reverb Technologies, 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.
+ */
+
+namespace {{invokerPackage}};
+
+use \Exception;
+
+class APIClientException extends Exception {
+  protected $response, $response_info;
+
+  public function __construct($message="", $code=0, $response_info=null, $response=null) {
+    parent::__construct($message, $code);
+    $this->response_info = $response_info;
+    $this->response = $response;
+  }
+
+  public function getResponse() {
+    return $this->response;
+  }
+
+  public function getResponseInfo() {
+    return $this->response_info;
+  }
+}
diff --git a/modules/swagger-codegen/src/main/resources/php/api.mustache b/modules/swagger-codegen/src/main/resources/php/api.mustache
index bf059063ffd..ca1bf24438d 100644
--- a/modules/swagger-codegen/src/main/resources/php/api.mustache
+++ b/modules/swagger-codegen/src/main/resources/php/api.mustache
@@ -19,6 +19,9 @@
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  */
+
+namespace {{invokerPackage}};
+
 {{#operations}}
 class {{classname}} {
 
diff --git a/modules/swagger-codegen/src/main/resources/php/composer.mustache b/modules/swagger-codegen/src/main/resources/php/composer.mustache
new file mode 100644
index 00000000000..fb47a865834
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/php/composer.mustache
@@ -0,0 +1,32 @@
+{
+  "name": "{{invokerPackage}}/{{invokerPackage}}-php",
+  "description": "{{description}}",
+  "keywords": [
+    "swagger",
+    "php",
+    "sdk",
+    "api"
+  ],
+  "homepage": "http://swagger.io",
+  "license": "Apache v2",
+  "authors": [
+    {
+      "name": "Swagger and contributors",
+      "homepage": "https://github.com/swagger-api/swagger-codegen"
+    }
+  ],
+  "require": {
+    "php": ">=5.3.3",
+    "ext-curl": "*",
+    "ext-json": "*",
+    "ext-mbstring": "*"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "~4.0",
+    "satooshi/php-coveralls": "~0.6.1",
+    "squizlabs/php_codesniffer": "~2.0"
+  },
+  "autoload": {
+    "psr-4": { "{{invokerPackage}}\\" : "lib/" }
+  }
+}
diff --git a/modules/swagger-codegen/src/main/resources/php/model.mustache b/modules/swagger-codegen/src/main/resources/php/model.mustache
index 4540f973633..614334353de 100644
--- a/modules/swagger-codegen/src/main/resources/php/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/php/model.mustache
@@ -15,14 +15,18 @@
  *  limitations under the License.
  */
 
+{{#models}}
+{{#model}}
 /**
- * $model.description$
+ * {{description}}
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  *
  */
-{{#models}}
-{{#model}}
+
+namespace {{invokerPackage}}\models;
+
+use \ArrayAccess;
 
 class {{classname}} implements ArrayAccess {
   static $swaggerTypes = array(
@@ -41,7 +45,7 @@ class {{classname}} implements ArrayAccess {
   */{{/description}}
   public ${{name}}; /* {{{datatype}}} */{{/vars}}
 
-  public function __construct(array $data) {
+  public function __construct(array $data = null) {
     {{#vars}}$this->{{name}} = $data["{{name}}"];{{#hasMore}}
     {{/hasMore}}{{/vars}}
   }
diff --git a/modules/swagger-codegen/src/main/resources/php/require.mustache b/modules/swagger-codegen/src/main/resources/php/require.mustache
new file mode 100644
index 00000000000..058aa169504
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/php/require.mustache
@@ -0,0 +1,16 @@
+<?php
+// source code generated by http://restunited.com
+// for any feedback/issue, please send to feedback{at}restunited.com
+
+// load models defined for endpoints
+foreach (glob(dirname(__FILE__)."/lib/models/*.php") as $filename)
+{
+      require_once $filename;
+}
+
+// load classes for accessing the endpoints
+foreach (glob(dirname(__FILE__)."/lib/*.php") as $filename)
+{
+      require_once $filename;
+}
+?>
diff --git a/modules/swagger-codegen/src/test/resources/2_0/petstore.json b/modules/swagger-codegen/src/test/resources/2_0/petstore.json
index b4678fc3ab9..37863375b89 100644
--- a/modules/swagger-codegen/src/test/resources/2_0/petstore.json
+++ b/modules/swagger-codegen/src/test/resources/2_0/petstore.json
@@ -848,6 +848,7 @@
       }
     },
     "Category": {
+      "description" : "testing category description",
       "properties": {
         "id": {
           "type": "integer",
diff --git a/samples/client/petstore/php/SwaggerPetstore-php/SwaggerPetstore.php b/samples/client/petstore/php/SwaggerPetstore-php/SwaggerPetstore.php
new file mode 100644
index 00000000000..058aa169504
--- /dev/null
+++ b/samples/client/petstore/php/SwaggerPetstore-php/SwaggerPetstore.php
@@ -0,0 +1,16 @@
+<?php
+// source code generated by http://restunited.com
+// for any feedback/issue, please send to feedback{at}restunited.com
+
+// load models defined for endpoints
+foreach (glob(dirname(__FILE__)."/lib/models/*.php") as $filename)
+{
+      require_once $filename;
+}
+
+// load classes for accessing the endpoints
+foreach (glob(dirname(__FILE__)."/lib/*.php") as $filename)
+{
+      require_once $filename;
+}
+?>
diff --git a/samples/client/petstore/php/SwaggerPetstore-php/composer.json b/samples/client/petstore/php/SwaggerPetstore-php/composer.json
new file mode 100644
index 00000000000..7109d7a8790
--- /dev/null
+++ b/samples/client/petstore/php/SwaggerPetstore-php/composer.json
@@ -0,0 +1,32 @@
+{
+  "name": "SwaggerPetstore/SwaggerPetstore-php",
+  "description": "",
+  "keywords": [
+    "swagger",
+    "php",
+    "sdk",
+    "api"
+  ],
+  "homepage": "http://swagger.io",
+  "license": "Apache v2",
+  "authors": [
+    {
+      "name": "Swagger and contributors",
+      "homepage": "https://github.com/swagger-api/swagger-codegen"
+    }
+  ],
+  "require": {
+    "php": ">=5.3.3",
+    "ext-curl": "*",
+    "ext-json": "*",
+    "ext-mbstring": "*"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "~4.0",
+    "satooshi/php-coveralls": "~0.6.1",
+    "squizlabs/php_codesniffer": "~2.0"
+  },
+  "autoload": {
+    "psr-4": { "SwaggerPetstore\\" : "lib/" }
+  }
+}
diff --git a/samples/client/petstore/php/Swagger.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/APIClient.php
similarity index 89%
rename from samples/client/petstore/php/Swagger.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/APIClient.php
index 3d6b77d819e..1f72299756f 100644
--- a/samples/client/petstore/php/Swagger.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/APIClient.php
@@ -15,24 +15,11 @@
  *  limitations under the License.
  */
 
-/* Autoload the model definition files */
-/**
- *
- * @param string $className the class to attempt to load
- */
-function swagger_autoloader($className) {
-  $currentDir = dirname(__FILE__);
-  if (file_exists($currentDir . '/' . $className . '.php')) {
-    include $currentDir . '/' . $className . '.php';
-  } elseif (file_exists($currentDir . '/models/' . $className . '.php')) {
-    include $currentDir . '/models/' . $className . '.php';
-  }
-}
-spl_autoload_register('swagger_autoloader');
-
+namespace SwaggerPetstore;
 
 class APIClient {
 
+  public static $PATCH = "PATCH";
   public static $POST = "POST";
   public static $GET = "GET";
   public static $PUT = "PUT";
@@ -199,7 +186,7 @@ class APIClient {
    * @return string the serialized object
    */
   public static function toPathValue($value) {
-      return rawurlencode(toString($value));
+      return rawurlencode(self::toString($value));
   }
 
   /**
@@ -214,7 +201,7 @@ class APIClient {
         if (is_array($object)) {
             return implode(',', $object);
         } else {
-            return toString($object);
+            return self::toString($object);
         }
   }
 
@@ -226,7 +213,7 @@ class APIClient {
    * @return string the header string
    */
   public static function toHeaderValue($value) {
-      return toString($value);
+      return self::toString($value);
   }
 
   /**
@@ -237,7 +224,7 @@ class APIClient {
    * @return string the form string
    */
   public static function toFormValue($value) {
-      return toString($value);
+      return self::toString($value);
   }
 
   /**
@@ -292,6 +279,7 @@ class APIClient {
       settype($data, $class);
       $deserialized = $data;
     } else {
+      $class = "SwaggerPetstore\\models\\".$class;
       $instance = new $class();
       foreach ($instance::$swaggerTypes as $property => $type) {
         if (isset($data->$property)) {
@@ -307,20 +295,3 @@ class APIClient {
 
 }
 
-class APIClientException extends Exception {
-  protected $response, $response_info;
-
-  public function __construct($message="", $code=0, $response_info=null, $response=null) {
-    parent::__construct($message, $code);
-    $this->response_info = $response_info;
-    $this->response = $response;
-  }
-
-  public function getResponse() {
-    return $this->response;
-  }
-
-  public function getResponseInfo() {
-    return $this->response_info;
-  }
-}
diff --git a/samples/client/petstore/php/SwaggerPetstore-php/lib/APIClientException.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/APIClientException.php
new file mode 100644
index 00000000000..8f083caf6f9
--- /dev/null
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/APIClientException.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ *  Copyright 2015 Reverb Technologies, 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.
+ */
+
+namespace SwaggerPetstore;
+
+use \Exception;
+
+class APIClientException extends Exception {
+  protected $response, $response_info;
+
+  public function __construct($message="", $code=0, $response_info=null, $response=null) {
+    parent::__construct($message, $code);
+    $this->response_info = $response_info;
+    $this->response = $response;
+  }
+
+  public function getResponse() {
+    return $this->response;
+  }
+
+  public function getResponseInfo() {
+    return $this->response_info;
+  }
+}
diff --git a/samples/client/petstore/php/PetApi.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/PetApi.php
similarity index 99%
rename from samples/client/petstore/php/PetApi.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/PetApi.php
index 4cc555eeefc..7a885b45b82 100644
--- a/samples/client/petstore/php/PetApi.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/PetApi.php
@@ -19,6 +19,9 @@
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  */
+
+namespace SwaggerPetstore;
+
 class PetApi {
 
   function __construct($apiClient) {
diff --git a/samples/client/petstore/php/StoreApi.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/StoreApi.php
similarity index 99%
rename from samples/client/petstore/php/StoreApi.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/StoreApi.php
index 169766a8e76..90fb0f4d4f8 100644
--- a/samples/client/petstore/php/StoreApi.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/StoreApi.php
@@ -19,6 +19,9 @@
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  */
+
+namespace SwaggerPetstore;
+
 class StoreApi {
 
   function __construct($apiClient) {
diff --git a/samples/client/petstore/php/UserApi.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/UserApi.php
similarity index 99%
rename from samples/client/petstore/php/UserApi.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/UserApi.php
index 4d5c3de954f..f6952074f7b 100644
--- a/samples/client/petstore/php/UserApi.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/UserApi.php
@@ -19,6 +19,9 @@
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  */
+
+namespace SwaggerPetstore;
+
 class UserApi {
 
   function __construct($apiClient) {
diff --git a/samples/client/petstore/php/models/Category.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Category.php
similarity index 90%
rename from samples/client/petstore/php/models/Category.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/models/Category.php
index 98e7ba24800..2bd2410268c 100644
--- a/samples/client/petstore/php/models/Category.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Category.php
@@ -16,12 +16,16 @@
  */
 
 /**
- * $model.description$
+ * testing category description
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  *
  */
 
+namespace SwaggerPetstore\models;
+
+use \ArrayAccess;
+
 class Category implements ArrayAccess {
   static $swaggerTypes = array(
       'id' => 'int',
@@ -37,7 +41,7 @@ class Category implements ArrayAccess {
   public $id; /* int */
   public $name; /* string */
 
-  public function __construct(array $data) {
+  public function __construct(array $data = null) {
     $this->id = $data["id"];
     $this->name = $data["name"];
   }
diff --git a/samples/client/petstore/php/models/Order.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Order.php
similarity index 94%
rename from samples/client/petstore/php/models/Order.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/models/Order.php
index 2770e8bbbdf..87e8c812eb7 100644
--- a/samples/client/petstore/php/models/Order.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Order.php
@@ -16,12 +16,16 @@
  */
 
 /**
- * $model.description$
+ * 
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  *
  */
 
+namespace SwaggerPetstore\models;
+
+use \ArrayAccess;
+
 class Order implements ArrayAccess {
   static $swaggerTypes = array(
       'id' => 'int',
@@ -52,7 +56,7 @@ class Order implements ArrayAccess {
   public $status; /* string */
   public $complete; /* boolean */
 
-  public function __construct(array $data) {
+  public function __construct(array $data = null) {
     $this->id = $data["id"];
     $this->pet_id = $data["pet_id"];
     $this->quantity = $data["quantity"];
diff --git a/samples/client/petstore/php/models/Pet.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Pet.php
similarity index 94%
rename from samples/client/petstore/php/models/Pet.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/models/Pet.php
index eee7fa3784c..eb67904bf13 100644
--- a/samples/client/petstore/php/models/Pet.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Pet.php
@@ -16,12 +16,16 @@
  */
 
 /**
- * $model.description$
+ * 
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  *
  */
 
+namespace SwaggerPetstore\models;
+
+use \ArrayAccess;
+
 class Pet implements ArrayAccess {
   static $swaggerTypes = array(
       'id' => 'int',
@@ -52,7 +56,7 @@ class Pet implements ArrayAccess {
   */
   public $status; /* string */
 
-  public function __construct(array $data) {
+  public function __construct(array $data = null) {
     $this->id = $data["id"];
     $this->category = $data["category"];
     $this->name = $data["name"];
diff --git a/samples/client/petstore/php/models/Tag.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Tag.php
similarity index 92%
rename from samples/client/petstore/php/models/Tag.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/models/Tag.php
index f8efc998df6..a9982317ece 100644
--- a/samples/client/petstore/php/models/Tag.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/Tag.php
@@ -16,12 +16,16 @@
  */
 
 /**
- * $model.description$
+ * 
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  *
  */
 
+namespace SwaggerPetstore\models;
+
+use \ArrayAccess;
+
 class Tag implements ArrayAccess {
   static $swaggerTypes = array(
       'id' => 'int',
@@ -37,7 +41,7 @@ class Tag implements ArrayAccess {
   public $id; /* int */
   public $name; /* string */
 
-  public function __construct(array $data) {
+  public function __construct(array $data = null) {
     $this->id = $data["id"];
     $this->name = $data["name"];
   }
diff --git a/samples/client/petstore/php/models/User.php b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/User.php
similarity index 95%
rename from samples/client/petstore/php/models/User.php
rename to samples/client/petstore/php/SwaggerPetstore-php/lib/models/User.php
index d6b520eba51..8662f937bc8 100644
--- a/samples/client/petstore/php/models/User.php
+++ b/samples/client/petstore/php/SwaggerPetstore-php/lib/models/User.php
@@ -16,12 +16,16 @@
  */
 
 /**
- * $model.description$
+ * 
  *
  * NOTE: This class is auto generated by the swagger code generator program. Do not edit the class manually.
  *
  */
 
+namespace SwaggerPetstore\models;
+
+use \ArrayAccess;
+
 class User implements ArrayAccess {
   static $swaggerTypes = array(
       'id' => 'int',
@@ -58,7 +62,7 @@ class User implements ArrayAccess {
   */
   public $user_status; /* int */
 
-  public function __construct(array $data) {
+  public function __construct(array $data = null) {
     $this->id = $data["id"];
     $this->username = $data["username"];
     $this->first_name = $data["first_name"];
diff --git a/samples/client/petstore/php/test.php b/samples/client/petstore/php/test.php
new file mode 100644
index 00000000000..df10876feb5
--- /dev/null
+++ b/samples/client/petstore/php/test.php
@@ -0,0 +1,17 @@
+<?php
+//require_once('vendor/autoload.php');
+require_once('SwaggerPetstore-php/SwaggerPetstore.php');
+
+// initialize the API client
+$api_client = new SwaggerPetstore\APIClient('http://petstore.swagger.io/v2');
+$petId = 5;  // ID of pet that needs to be fetched
+try {
+    $pet_api = new SwaggerPetstore\PetAPI($api_client);
+    // return Pet (model)
+    $response = $pet_api->getPetById($petId);
+    var_dump($response);
+} catch (Exception $e) {
+    echo 'Caught exception: ', $e->getMessage(), "\n";
+}
+
+?>