Symfony 4.2.0 released

Symfony 4.2.0 has just been released. Here is a list of the most important changes:

  • bug #29343 [Form] Handle all case variants of "nan" when parsing a number (@mwhudson, @xabbuh)
  • bug #29373 [Routing] fix trailing slash redirection (@nicolas-grekas)
  • bug #29355 [PropertyAccess] calculate cache keys for property setters depending on the value (@xabbuh)
  • bug #29369 [DI] fix combinatorial explosion when analyzing the service graph (@nicolas-grekas)
  • bug #29349 [Debug] workaround opcache bug mutating "$this" !?! (@nicolas-grekas)
  • bug #29344 Fixes sprintf(): Too few arguments in Translator (@stephanedelprat)
  • bug #29318 [Console] Move back root exception to stack trace in verbose mode (@chalasr)

Want to upgrade to this new release? Fortunately, because Symfony protects backwards-compatibility very closely, this should be quite easy. Read our upgrade documentation to learn more.

Want to be notified whenever a new Symfony release is published? Or when a version is not maintained anymore? Or only when a security issue is fixed? Consider subscribing to the Symfony Roadmap Notifications.


Please keep in mind that the changelog of this blog post is generated automatically and it only contains the changes since last version, which was Symfony 4.2.0 Release Candidate 1.

For the whole list of new Symfony 4.2 features, check
Yeah! great work! cache, env, messenger
It looks like is not (yet) up to date
Great, many thanks.
In this tweet ( Ryan Weaver suggests making an addition to the composer.json file in order to improve performance. It seems like this line needs to be updated when upgrading to 4.2. Should this perhaps be documented somewhere?
realeased but cannot install with composer :
composer create-project symfony/website-skeleton anothertest42 4.2
Could not find package symfony/website-skeleton with version 4.2.
Upgraded 4.1 to 4.2 . Its work fine .
Thanks for great work
sorry it works fine for get the symfony 4.2 with composer, i was using a wrong command...

if i specify the version 4.2... composer cannot get the 4.2 version... :

wrong command :
> composer create-project symfony/website-skeleton test42 4.2

good command :
> composer create-project symfony/website-skeleton test42
use function dd Notice: Undefined index: argv . why

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