Symfony PHP模板自定义错误页面

当然。

在services.yml中，为异常添加侦听器:

listener.exception:
    class: Symfony'Component'HttpKernel'EventListener'ExceptionListener
    arguments: ["MyWebsite''Controller''ExceptionController::exceptionAction"]
    tags:
        - {name: 'kernel.event_subscriber'}

那么你的控制器就是一个普通的控制器:

<?php
namespace MyWebsite'Controller;
use Symfony'Component'Debug'Exception'FlattenException;
use Symfony'Component'HttpFoundation'Response;
class ExceptionController extends AbstractController
{
    public function exceptionAction(FlattenException $exception)
    {
        $text = $exception->getMessage() ;
        if (isset(Response::$statusTexts[$exception->getStatusCode()])) {
            $text = Response::$statusTexts[$exception->getStatusCode()];
        }
        $response = new Response(null);
        $response->setStatusCode($exception->getStatusCode());
        return $this->render(
            'exception.html.twig',    // Here your template
            ['error' =>$text],
            $response
        );
    }
}