Moving on to Silex from Legacy PHP
This article will show you how you can take some major steps in elevating your legacy application and making it run another ten years. Let it be not-so-legacy anymore!
I just came across this great article by Matthias Noback. Read this if you've ever wondered how to move on from a legacy PHP project and you cannot rewrite your application at once. Just wrap it with Silex and improve your code bit by bit.