AppKernel.php

<?php


use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel;

class AppKernel extends Kernel
{


    public function registerBundles()
    {
        $bundles = [
            new \Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
            new \Symfony\Bundle\TwigBundle\TwigBundle(),
            new \Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
            new AppBundle\AppBundle(),
        ];

        if($this->getEnvironment() == 'dev') {
            $bundles[] = new \Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
        }

        return $bundles;
    }


    public function registerContainerConfiguration(LoaderInterface $loader)
    {
        $loader->load(__DIR__.'/config/config.yml');

        $isDevEnv = $this->getEnvironment() == 'dev';


        $loader->load(function (ContainerBuilder $container) use($isDevEnv) {

           if($isDevEnv) {
               $container->loadFromExtension('web_profiler', [
                  'toolbar' => true,
               ]);
           }

            if ($isDevEnv) {
                $container->loadFromExtension('framework', array(
                    'router' => array(
                        'resource' => '%kernel.root_dir%/config/routing_dev.yml',
                    )
                ));
            }
        });
    }
}

config.yml

framework:
    secret: AJSZDLW)992372
    router:
        resource: '%kernel.root_dir%/config/routing.yml'
    templating:
        engines: [twig]
    profiler:
        enabled: "%kernel.debug%"

index.php

<?php

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Debug\Debug;


umask(0000);



$loader = require_once __DIR__.'/../config/autoload.php';

$dotenv = new \Dotenv\Dotenv(__DIR__.'/../');
$dotenv->load();

$env = $_SERVER['SYMFONY_ENV'];
$debug = $_SERVER['SYMFONY_DEBUG'];

if ($debug) {
    Debug::enable();
}

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

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

routing.yml

app_annotations:
    resource: '@AppBundle/Controller'
    type: annotation

routing_dev.yml

_wdt:
    resource: '@WebProfilerBundle/Resources/config/routing/wdt.xml'
    prefix: /_wdt

_profiler:
    resource: '@WebProfilerBundle/Resources/config/routing/profiler.xml'
    prefix: /_profiler

_main:
    resource: routing.yml