A minimal Symfony Components Framework

composer.json

{
    "require": {
        "php": ">=5.3.2",
        "symfony/symfony": "2.1-dev"
    }
}

index.php

<?php

require_once "vendor/.composer/autoload.php";

use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\HttpKernel\Controller\ControllerResolver;
use Symfony\Component\HttpKernel\HttpKernel;
use Symfony\Component\HttpKernel\EventListener\RouterListener;

$routes = new RouteCollection();
$routes->add('hello', new Route('/hello', array('_controller' =>
    function (Request $request) {
        return new Response(sprintf("Hello %s", $request->get('name')));
    }
)));
 
$request = Request::createFromGlobals();

$context = new RequestContext();
$context->fromRequest($request);

$matcher = new UrlMatcher($routes, $context);

$dispatcher = new EventDispatcher();
$dispatcher->addSubscriber(new RouterListener($matcher));

$resolver = new ControllerResolver();

$kernel = new HttpKernel($dispatcher, $resolver);

$kernel->handle($request)->send();