$request * @return */ public function execute($request) { $this->setLayout(false); sfConfig::set('sf_web_debug', false); sfConfig::set('sf_debug', false); if ($this->getRequest()->isXmlHttpRequest()) { $this->getResponse()->setHttpHeader('Content-Type', 'application/json; charset=utf-8'); } $systemUser = $request->getParameter('systemUser'); $userId = $request->getParameter('user_id'); $systemUserService = new SystemUserService(); $user = $systemUserService->isExistingSystemUser($systemUser['userName'],$userId); $isExisting = ( $user instanceof SystemUser)?false:true; return $this->renderText(json_encode( $isExisting)); } } ?>