Symfony 2.8 MicroKernel

app-MicroKernel.php

<?php

// app/MicroKernel.php
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Routing\RouteCollectionBuilder;

class MicroKernel extends Kernel
{
    use MicroKernelTrait;

    public function registerBundles()
    {
        return array(new Symfony\Bundle\FrameworkBundle\FrameworkBundle());
    }

    protected function configureRoutes(RouteCollectionBuilder $routes)
    {
        $routes->add('/', 'kernel:indexAction', 'index');    }

    protected function configureContainer(ContainerBuilder $c, LoaderInterface $loader)
    {
        // framework.secret est le seul paramètre obligatoire pour le framework
        $c->loadFromExtension('framework', ['secret' => '12345']);
    }

    public function indexAction()
    {
        return new Response('Bonjour Aramis!');
    }
}

web-api.php

<?php

// web/api.php
use Symfony\Component\HttpFoundation\Request;

$loader = require __DIR__.'/../app/autoload.php';
require_once __DIR__.'/../app/MicroKernel.php';

// Vous voulez bien sur changer la valeur de l'environnement en-dessous !
$app = new MicroKernel('prod', false);
$app->loadClassCache();

$app->handle(Request::createFromGlobals())->send();