Symfony is an application framework written in PHP that can be used to create robust web applications. The Symfony framework consists of numerous reusable components, many of which Drupal 8 includes in its core library. Learning Symfony will help you advance your skills as a web developer as well as give you a greater understanding of how things work "under the hood" in Drupal 8.
What is Symfony?
Symfony is a set of PHP Components, a Web Application framework, a Philosophy, and a Community -- all working together in harmony.
What are Symfony Components?
A set of decoupled and reusable components on which the best PHP applications are built, such as Drupal, phpBB, and eZ Publish.
- Create PHP web applications using best practices
- Create routes and controllers
- Create and use special PHP objects called services
- Organize code into reusable chunks
Drupalize.Me includes resources for learning Symfony versions 2, 3, and 4 produced by our friends Ryan Weaver--Symfony documentation lead--and Leanna Pelham at KnpUniversity. The current version of Symfony is 4, but Drupal 8.3 and earlier use Symfony 2 components, and we have included tutorials for all versions. The official Symfony documentation is the canonical source and should be consulted in conjunction with other training materials.