Symfony\Component\HttpKernel\Event\FilterResponseEvent::getResponse PHP Method

    public function getResponse()
    {
        return $this->response;
    }

 /**
  * 输出debugBar，只有当页面有</body>标签时有效。
  *
  * @param FilterResponseEvent $event
  */
 public function onKernelResponse(FilterResponseEvent $event)
 {
     $response = $event->getResponse();
     $request = $event->getRequest();
     if (!$event->isMasterRequest()) {
         return;
     }
     if ($request->isXmlHttpRequest()) {
         return;
     }
     if ($response->isRedirection() || $response->headers->has('Content-Type') && false === strpos($response->headers->get('Content-Type'), 'html') || 'html' !== $request->getRequestFormat()) {
         return;
     }
     $path = null;
     if ($this->app['debug_bar.auto_res']) {
         $scriptName = $event->getRequest()->server->get('SCRIPT_NAME');
         $path = $scriptName . $this->app['debug_bar.path'];
     } else {
         $path = $this->app['debug_bar.path'];
     }
     $render = $this->app['debug_bar']->getJavascriptRenderer($path);
     ob_start();
     echo $render->renderHead();
     echo $render->render();
     $debugContent = ob_get_contents();
     ob_end_clean();
     $content = $response->getContent();
     if (false === strpos($content, '</body>')) {
         $content .= $debugContent;
     } else {
         $content = str_replace("</body>", $debugContent . '</body>', $content);
     }
     $event->getResponse()->setContent($content);
 }