Henrik Bjrnskov

Hello there! I am a developer with a big crush on open source. I work for Firmafon/Firma.co in Copenhagen, Denmark.

You can see of my open source projects on GitHub (Stampie, Bernard etc.) and read my ramblings on Twitter.

Using Symfony Router with Silex

15 Jul 2013

In my last post i showed how to load configuration files with Silex with caching. This post is going to be about leveraging the full Router found in Symfony Routing component.

Again this is a service provider which can be found in Flint.


The first reason is caching and performance. With Silex every ->get call requires the route to be added on every request. While this is awesome for small applications it can be a real performance killer later on.

Second reason is loading from a configuration file such as xml or yaml. This makes sure your routes are not scattered all around in different files and forces you to use classes for controllers.

It is important to know that the old ->get methods still works.

Getting Started

Add Flint to your composer file:

    "require" : {
        "flint/flint" : "~1.4"

Now you need to add the service providers. Routing requires some of the services provided by ConfigServiceProvider also you need to specific you initial routing resource.


$app = new Silex\Application;
$app->register(new Flint\Provider\ConfigServiceProvider);
$app->register(new Flint\Provider\RoutingServiceProvider, array(
    'routing.resource' => '/path/to/routing.xml',
    'routing.options' => array(
        'cache_dir' => '/path/to/cache',

If there is any routes in you routing.xml file you should be able to find the dumped routes in your cache dir.

If you use ServiceControllerServiceProvider you can still use configuration files by specifying the service id in routing.xml like so:

<?xml version="1.0" encoding="UTF-8" ?>
<routes xmlns="http://symfony.com/schema/routing"
    xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">

    <route id="homepage" pattern="/">
        <default key="_controller">controller_default_service</default>


As davedevelopment noted on #Silex some benchmarking should be done. I created a maybe naive benchmark where an application with cached router and an application with 100 ->get routes are tested. You can find the code here.

    Method Name           Iterations    Average Time      Ops/second
    -------------------  ------------  --------------    -------------
    routesHelperMethods: [10,000    ] [0.0001219873905] [8,197.56858]
    routerCache        : [10,000    ] [0.0000385820866] [25,918.76410]