/** * 获取404错误对应的错误内容 * @param Kernel $kernel * @param Application $application * @param array $parameters * @return string */ protected function getNotFoundContent(Kernel $kernel, Application $application = null, array $parameters = []) { if (!is_null($application)) { $content = $this->renderContentFromView($application, '404', $parameters); } else { $content = <<<EOT <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>404 Not Found</title> </head><body> <h1>Not Found</h1> <p>The requested URL {$kernel->getParameter('request')->getPathInfo()} was not found on this server.</p> </body></html> EOT; } return $content; }