Cover of the book Symfony 5: The Fast Track

Symfony 5: The Fast Track is the best book to learn modern Symfony development, from zero to production. +300 pages in full color showing how to combine Symfony with Docker, APIs, queues & async tasks, Webpack, Single-Page Applications, etc.

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Symfony 4.3.0 released

Symfony 4.3.0 has just been released. Here is a list of the most important changes:

  • bug #31654 [HttpFoundation] Do not set X-Accel-Redirect for paths outside of X-Accel-Mapping (@vilius-g)

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.


For those of you thinking that Symfony 4.3 only adds one feature, keep in mind that the content of this blog is automated and the changelog is generated from the previous version, which is "Symfony 4.3.0 Release Candidate 1".

If you want to check the real changelog of new Symfony 4.3 features, check this:

I agree with that. Thank you to everyone who contributed to the 4.3 release.
Please don't do any updates until all the deprecation of inner components are not solved or let not grow it any further. I got now 20 new deprecation from Symfony itself and find my own part to refactor even harder
is there any chance to get offline pdf documentation? for 4.3, not Version: master
generated on July 28, 2016. I would like to read it on ebook reader, reading on laptop is not best option for my eyes ;)
btw. are there any plans to bump php version requirement for Symfony 5?
@Bolla please report issue or fixes if you found inner deprecations. Our CI should ensure there are caught but maybe you found others? The ball is in your court.

@Michal 7.2.9 for now at least yes! That's already merged.
@Nicolas Grekas

Sounds super reasonable. And that version will have support until 2029 on RHEL/CentOS.
@Michal I can generate the PDF for you if you need it. And explain how to do it yourself as well :)
Great job .Congratulation !!
Yeah thank you everyone! Great job!

One of my favorite parts of Symfony is the clear and concise roadmap. New versions are always released on time :)
@Michal Piotrowski The PDFs are generated. I'm going to remove "The Book" as it does not exist anymore since... 2016. That's why you get an old version. The documentation has been refactored since then.
I love Symfony and you do great job !
But after update to Symfony 4.3.1, I can not use:
@ORM\Column(type="bigint") in my entity
I have message validator after submit form:
This value should be of type string.

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