Gonzalo Ayuso has posted yet another helpful Silex hint for those using this microframework and wanting to scale up their applications past the prototype stage - an extension to allow route definition in a YAML configuration.

My idea is to store this information within a Service Container (we will use Symfony's DIC). For example here we can [define] our routes.yml. [...] We need to implement one Extension for the alias "routes". We only will implement the needed functions for YAML files in this example.

He includes the code for the extension ("SilexRouteExtension") that can be used to parse the "routes.yml" file to inject the custom routing into your application. This includes the pattern to match, the controller to route it to and the target method. You can also set some requirements like the request method (in this case "GET").