Symfony2: Remove the need for app_dev.php

app.php

<?php

$env = 'prod';
$debug = false;

if(isset($_SERVER['APP_KERNEL'])) {
    switch($_SERVER['APP_KERNEL']) {
        case 'test':
        case 'qa':
        case 'dev':
            $env = $_SERVER['APP_KERNEL'];
            break;
    }
}

if($env !== 'prod') {
    $debug = true;
}

use Symfony\Component\ClassLoader\ApcClassLoader;
use Symfony\Component\HttpFoundation\Request;

$loader = require_once __DIR__.'/../app/bootstrap.php.cache';

// Use APC for autoloading to improve performance.
// Change 'sf2' to a unique prefix in order to prevent cache key conflicts
// with other applications also using APC.

if($env == 'prod') {
    $loader = new ApcClassLoader('apc_app_loading_cache', $loader);
    $loader->register(true);
}

require_once __DIR__.'/../app/AppKernel.php';

$kernel = new AppKernel($env, $debug);
$kernel->loadClassCache();

if($env == 'prod') {
    require_once __DIR__.'/../app/AppCache.php';
    $kernel = new AppCache($kernel);
}

$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);