返回 404 回复

当在服务器上找不到资源时返回 404 响应，在 Symfony 中，可以通过抛出 NotFoundHttpException 异常来创建此状态。为避免控制器内部的额外 use 语句，请使用 Controller 类提供的 createNotFoundException()

<?php

namespace Bundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;

class TestController extends Controller
{
    /**
     * @Route("/{id}", name="test")
     * Recommended to avoid template() as it has a lot of background processing.
     * Query database for 'test' record with 'id' using param converters.
     */
    public function testAction(Test $test)
    {
        if (!$test) {
            throw $this->createNotFoundException('Test record not found.');
        }
        return $this->render('::Test/test.html.twig', array('test' => $test));
    }

}