Symfony is a PHP web application framework. It has a set of reusable PHP components/libraries. It was published as a free software on 2005 and the current version is 3.2.7. It has extensible object-oriented architecture and developer tools for enabling rapid application development. It can be easily customized with any data structure, API, or technology. It can be integrated with a variety of databases like SQL, NoSQL, graph databases, and other technologies.