ما حل هذا الخطأ You are not allowed to access this file .

استعمل Symfony لتتبيث لوحة التحكم ، لكن عن الوصول لملف app_dev.php

يظهر لي هذا الخطأ

You are not allowed to access this file. Check app_dev.php for more information.

هذا محتوى الملف

<?php
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Debug\Debug;
ini_set('memory_limit', '-1');
// If you don't want to setup permissions the proper way, just uncomment the following PHP line
// read 

// for more information 
//umask(0000);
// This check prevents access to debug front controllers that are deployed by accident to production servers.
// Feel free to remove this, extend it, or make something more sophisticated.
if (isset($_SERVER['HTTP_CLIENT_IP'])
|| isset($_SERVER['HTTP_X_FORWARDED_FOR']))
{
header('HTTP/1.0 403 Forbidden');
exit('You are not allowed to access this file. Check '.basename(__FILE__).' for more information.');
}
/** @var \Composer\Autoload\ClassLoader $loader */$loader = require __DIR__.'/../app/autoload.php';
Debug::enable();
$kernel = new AppKernel('dev', true);
$kernel->loadClassCache();
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);