Using the Symfony 2 Routing component to match URLs - http://www.symfonycentral.com

routing.php

<?php 

// ...

/* Define the routes for our application */ 
$routes = new Routing\RouteCollection();
$routes->add('hello', new Routing\Route('/hello/{name}', array('name' => 'World')));
$routes->add('bye', new Routing\Route('/bye'));

/* Set up the context and establish whether this request matches a route */
$context = new Routing\RequestContext();
$context->fromRequest($request);
$matcher = new Routing\Matcher\UrlMatcher($routes, $context);

$match = $matcher->match($request->getPathInfo();

// ...