public function encode($data, $human_readable = false)
 {
     $this->init();
     require_once $this->path . 'OutputStream.php';
     require_once $this->path . 'Amf3/Serializer.php';
     $stream = new Zend_Amf_Parse_OutputStream();
     $serializer = new Zend_Amf_Parse_Amf3_Serializer($stream);
     $serializer->writeTypeMarker($data);
     return $stream->getStream();
 }

 /**
  * Serialize a PHP value to AMF3 format
  *
  * @param  mixed $value
  * @param  array $opts
  * @return string
  * @throws Zend_Serializer_Exception
  */
 public function serialize($value, array $opts = array())
 {
     try {
         $stream = new Zend_Amf_Parse_OutputStream();
         $serializer = new Zend_Amf_Parse_Amf3_Serializer($stream);
         $serializer->writeTypeMarker($value);
         return $stream->getStream();
     } catch (Exception $e) {
         throw new Zend_Serializer_Exception('Serialization failed by previous error', 0, $e);
     }
 }

 /**
  * Encountered and AMF3 Type Marker use AMF3 serializer. Once AMF3 is
  * encountered it will not return to AMf0.
  *
  * @param  string $data
  * @return Zend_Amf_Parse_Amf0_Serializer
  */
 public function writeAmf3TypeMarker(&$data)
 {
     // // require_once 'Zend/Amf/Parse/Amf3/Serializer.php';
     $serializer = new Zend_Amf_Parse_Amf3_Serializer($this->_stream);
     $serializer->writeTypeMarker($data);
     return $this;
 }

 public function sendData($data)
 {
     header("Cache-Control: no-cache, must-revalidate");
     header("Expires: 0");
     header('Content-Type: ' . $this->format);
     if ($this->format == RestFormat::AMF) {
         require_once 'Zend/Amf/Parse/OutputStream.php';
         require_once 'Zend/Amf/Parse/Amf3/Serializer.php';
         $stream = new Zend_Amf_Parse_OutputStream();
         $serializer = new Zend_Amf_Parse_Amf3_Serializer($stream);
         $serializer->writeTypeMarker($data);
         $data = $stream->getStream();
     } else {
         if (is_object($data) && method_exists($data, '__keepOut')) {
             $data = clone $data;
             foreach ($data->__keepOut() as $prop) {
                 unset($data->{$prop});
             }
         }
         $data = json_encode($data);
         if ($data && $this->mode == 'debug') {
             $data = $this->json_format($data);
         }
     }
     echo $data;
 }

 public function sendData($data)
 {
     header('Content-Type: ' . $this->format);
     if ($this->format == RestFormat::AMF) {
         require_once 'Zend/Amf/Parse/OutputStream.php';
         require_once 'Zend/Amf/Parse/Amf3/Serializer.php';
         $stream = new Zend_Amf_Parse_OutputStream();
         $serializer = new Zend_Amf_Parse_Amf3_Serializer($stream);
         $serializer->writeTypeMarker($data);
         $data = $stream->getStream();
     } else {
         if ($this->format == RestFormat::XML) {
             $data = ArrayToXML::toXml($data);
         } else {
             $data = json_encode($data);
             if ($data && $this->mode == 'debug') {
                 $data = $this->json_format($data);
                 $mathes = array();
                 $pattern = '/"new Date\\([0-9\\,\\s]*\\)"/';
                 $matches = array();
                 preg_match_all($pattern, $data, $matches);
                 $matches = $matches[0];
                 foreach ($matches as $match) {
                     $tmpStrLen = strlen($match);
                     $tmpStr = substr($match, 1, $tmpStrLen - 2);
                     $data = str_replace($match, $tmpStr, $data);
                 }
             }
         }
     }
     echo $data;
 }

 public function writeCollection(&$object)
 {
     // In order to get around the problems with ZendAMF and Iterator/foreach we create a vanilla object and use _explicitType to
     // map it on the client.  The source property maps to mx.collections.ArrayCollection::source.  We also need to add whether
     // or not the collection is initialized.
     $wrappedObject = new \stdClass();
     $wrappedObject->_explicitType = "org.davekeen.flextrine.orm.collections.PersistentCollection";
     if ($object instanceof \Doctrine\ORM\PersistentCollection) {
         $wrappedObject->source = $object->unwrap()->toArray();
         $wrappedObject->isInitialized__ = $object->isInitialized() || sizeof($wrappedObject->source) > 0;
     } else {
         $wrappedObject->source = $object->toArray();
         $wrappedObject->isInitialized__ = true;
     }
     parent::writeObject($wrappedObject);
 }