public function serializeResponse($object, $ignoreNull = false)
 {
     $start = microtime(true);
     KalturaLog::debug("Serialize start");
     KalturaResponseCacher::endCacheIfDisabled();
     $format = isset($this->params["format"]) ? $this->params["format"] : KalturaResponseType::RESPONSE_TYPE_XML;
     if (isset($this->params['content-type'])) {
         header('Content-Type: ' . $this->params['content-type']);
     } else {
         switch ($format) {
             case KalturaResponseType::RESPONSE_TYPE_XML:
                 header("Content-Type: text/xml");
                 break;
             case KalturaResponseType::RESPONSE_TYPE_JSON:
                 header("Content-Type: application/json");
                 break;
             case KalturaResponseType::RESPONSE_TYPE_JSONP:
                 header("Content-Type: application/javascript");
                 break;
         }
     }
     switch ($format) {
         case KalturaResponseType::RESPONSE_TYPE_XML:
             $serializer = new KalturaXmlSerializer($ignoreNull);
             echo '<?xml version="1.0" encoding="utf-8"?>';
             echo "<xml>";
             echo "<result>";
             $serializer->serialize($object);
             echo "</result>";
             echo "<executionTime>" . ($this->end - $this->start) . "</executionTime>";
             echo "</xml>";
             break;
         case KalturaResponseType::RESPONSE_TYPE_PHP:
             $serializer = new KalturaPhpSerializer($ignoreNull);
             $serializer->serialize($object);
             echo $serializer->getSerializedData();
             break;
         case KalturaResponseType::RESPONSE_TYPE_JSON:
             $serializer = new KalturaJsonSerializer($ignoreNull);
             $serializer->serialize($object);
             echo $serializer->getSerializedData();
             break;
         case KalturaResponseType::RESPONSE_TYPE_JSONP:
             $callback = isset($_GET["callback"]) ? $_GET["callback"] : null;
             if (is_null($callback)) {
                 die("Expecting \"callback\" parameter for jsonp format");
             }
             $serializer = new KalturaJsonSerializer($ignoreNull);
             $serializer->serialize($object);
             $response = array();
             echo $callback, "(", $serializer->getSerializedData(), ");";
             break;
     }
     KalturaLog::debug("Serialize took - " . (microtime(true) - $start));
 }