Symfony, sponsored by Sensio Labs, is a well-known PHP framework that integrates a number of open source PHP projects. (For example, Symfony uses the Zend framework’s logging system.) Conversely ...

For example, Yahoo! was one of the first Symfony user, adopting it shortly after the initial release in 2005. In 2011, the Symfony community released Symfony2, generating a high influx of new users.