Symfony is a web application framework written in PHP which follows the model-view-controller (MVC) paradigm. Released under the MIT license, Symfony is free software. The symfony-project.com website launched on October 18, 2005. ^[1] Symfony aims to speed up the creation and maintenance of web applications and to replace repetitive coding tasks. It requires a few prerequisites for installation: Unix, Linux, Mac OS or Microsoft Windows with a web server and PHP 5 installed. It is currently compatible with the following Object-relational mappings: Propel and Doctrine. ^[2] Symfony has low performance overheads when dealing with an environment that supports a PHP accelerator. It should be noted however, that in typical shared hosting environments where a PHP accelerator is not available, Symfony can use its own caching engine to speed code execution. Symfony2 borrows concepts from many frameworks like symfony 1, Django, Spring, and Ruby on Rails. It also leverages well-known PHP libraries like the Zend Framework and Doctrine. ^[3]