websites for implementing its business logic in the backend. Symfony components are also used in other web application frameworks including Laravel, which is another full-stack framework, and Silex, which is a microframework. Vogue Paris's website is also built on the Symfony framework Symfony's own website has a comprehensive list of projects using Symfony and a showcase of websites built with Symfony. Releases Symfony manages its releases through a time-based model; a new Symfony release comes out every six months: one in May and one in November. This release process has been adopted as of Symfony 2.2, and all the "rules" explained in this document must be strictly followed as of Symfony 2.4. The standard version of Symfony is maintained for eight months, whereas long-term support (LTS) versions are supported for three years. A new LTS release is published biennially. The current LTS release is version 5.4 as per https://symfony.com/releases/5.4. See also Comparison of server-side web frameworks Lime, a Test framework for Symfony 1 Zend Framework References Further reading Potencier, Fabien. (2022). Symfony 6: The Fast Track. Leanpub. Potencier, Fabien and Zaninotto, François. (2007). The Definitive Guide to symfony. Apress. . Potencier, Fabien. (2009). Practical symfony (2009). Sensio Labs Books. Doctrine edition, , Propel edition, , and Spanish edition available on lulu.com. Fabien Potencier, Hugo Hamon: Symfony, Mieux développer en PHP avec symfony 1.2 et Doctrine, Eyrolles 2009, , French Tim Bowler, Wojciech Bancer (2009). Symfony 1.3 Web Application Development, Packt. . External links SymfonyCasts Free software programmed in PHP PHP frameworks Software using the MIT license Web frameworks