Symfony 4

A Better Symfony

Symfony 4 represents a rethinking of its ideas and features from the ground up to match the industry practices: application bundles are gone, config parameters are now environment variables, the application directory structure is easier to navigate and hundreds of other small improvements that will make you love Symfony.

The result is less Symfony concepts and more standard practices. Easier to learn, easier to configure, easier to install and deploy. Simple, powerful, amazing!

Micro by default

New applications created with Symfony 4 are based on a micro-kernel and contain 70% less code and files than new Symfony 3 apps! We worked tirelessly to optimize Symfony and remove any non-essential dependencies. The result is the leanest Symfony version ever created and the smallest footprint across all PHP frameworks.

Start small and grow your Symfony app as your project scales. Symfony is now ideal for any type of project: microservices, APIs, monolithic web applications, console applications or backends for JavaScript applications.

Smooth Upgrade

Thanks to our unrivaled Backward Compatibility Promise, upgrading your existing applications to Symfony 4 will be a smooth experience. First, upgrade to Symfony 3.4, which provides total compatibility with any Symfony 3.x version. Then fix any reported deprecation and you are ready to upgrade instantly to Symfony 4.