Symfony 4 was released on November 30th.
Update now to the best Symfony ever!

Silex

Silex is a PHP microframework built on the shoulders of Symfony and Pimple and also inspired by Sinatra. A microframework provides the guts for building simple single-file apps. Silex aims to be: concise (it exposes an intuitive and concise API that is fun to use), extensible (it has an extension system based around the Pimple micro service-container that makes it even easier to tie in third party libraries) and testable (it uses Symfony's HttpKernel, which abstracts request and response and simplifies app testing).

Components used by this project