Symfony 3.0.0 was released on November 2015 as planned by the Symfony 3 roadmap. As we do with any new Symfony version, we should publish a blog series explaining its new features.

However, Symfony 3.0 is a very special version which contains no new features comparing it with Symfony 2.8. Their only difference is that 3.0 removed any feature marked as deprecated in 2.8.

That's why we won't publish any "New in Symfony 3.0" post. Instead, let's do a quick recap of the new Symfony 2.8 features which are also available on Symfony 3.0.

New components: PropertyInfo (details), Guard Authentication (details), LDAP (details) and twelve Polyfill components (details).
Major redesigns of the web debug toolbar (details) the profiler (details) and the console commands (details).
New DependencyInjection features, such as "auto-wiring" (details), deprecated services (details), removed scopes (details) and more (details).
A MicroKernel to create your own microframework based on Symfony (details).
Nice improvements and new features for the Console component (details), the Yaml component (details), the Form component (details), the Translator component (details), the VarDumper component (details) and the Security component (details).
Better and faster tests (details).
And a lot of minor DX improvements to make you feel better and more productive when using Symfony (details).

Upgrading to Symfony 3.0

First, make your application run on Symfony 2.8 without errors. Then, install the PHPUnitBridge component and fix all the reported deprecation issues. Now you are ready to upgrade to Symfony 3.0. You can also use any of these tools to spot and fix those deprecations:

Published in #Living on the edge

Tomas Votruba said on Mar 16, 2016 at 10:35

Thanks for summing up. Really useful overview

Nicolas NSSM said on Mar 16, 2016 at 11:07

Do we have to understand that SF3.0 is kind of a LTS as it's "only" an undeprecated version of 2.8 which is LTS?

Javier Eguiluz Certified said on Mar 16, 2016 at 11:57

@Nicolas I'm afraid that's not true. 3.0 is a regular Symfony version and its support will end on July 2016: http://symfony.com/roadmap?version=3.0#checker

The LTS version of the 3.x branch will be 3.4: http://symfony.com/roadmap?version=3.4#checker

Nicola Pietroluongo said on Mar 16, 2016 at 17:11

I really like the "auto-wiring" :-)

Manuel Kießling said on Mar 17, 2016 at 08:20

I wrote an extensive blog post about upgrading a Symfony application from 2.6 to 3.0: http://manuel.kiessling.net/2015/12/07/upgrading-a-symfony-project-from-2-6-to-3-0/

Maybe this is helpful for some of you.

elk1o said on Mar 17, 2016 at 14:27

How can I make and link in controller a custom parameters.yml ? Thanks

New in Symfony 3.0

Upgrading to Symfony 3.0

Comments

Become a Symfony contributor