Web PHP Framework - symfony

Symfony is a Model-View-Controller (MVC) framework written in PHP that’s aimed at building web applications. If you’re already familiar with the MVC paradigm, you won’t be surprised by the way symfony organizes scripts. If you aren’t familiar with MVC, you just need to understand that separating the code into three parts — the logic code (called the Model), the presentation code (the View), and the request handling code (the Controller) — is a good way to ensure the maintainability and reusability of code.

Source : http://www.symfony-project.org/
Download : http://www.symfony-project.org/installation
Documentation : http://www.symfony-project.org/doc/