Since updating my server earlier in the year, and thus moving to PHP 8, I would’ve been able to update to Symfony 6. I didn’t get around to it until today, though. I’ve been fixing deprecations in my code mostly as they appear (in profiler, console, logs, or automated tests) so I didn’t have a lot to do this time. I changed ^5.4 to ^6.4 in my composer.json and then had to adjust a few minor things in config. Some of those took longer than they should’ve though.
The biggest other thing I needed to fix was making a version of the “twig” service public, as it is now private by default. I access that for my blog, which is run by WordPress but uses the templates from Symfony / Twig to render the content. Since I no longer have a working version of that locally, I found out about the problem on the live server and had my blog throwing a 503 error for 10+ minutes while I figured out a solution. The solution was to add a service alias with a different name in my services.yml, like:
services:
templates:
alias: twig
public: true
and then replace the service name in the place it was called.
The other issues were mostly related to dev and testing stuff. I removed an autoload-dev call that I had for var-dumper, which looked like:
{
"autoload-dev": {
"files": ["vendor/symfony/var-dumper/Resources/functions/dump.php"]
}
}
because it happens automatically from the package and I was getting a warning. It looks like this should’ve been the case for a long time though, so I’m not sure why I had that there.
In Symfony config for some PHPUnit tests, I had to change storage_id: session.storage.mock_file to storage_factory_id: session.storage.mock_file. I think that may have been changed earlier, but I had a workaround in place that stopped working with 6.
Other than that, like I said, I had been fixing deprecations as they were found, so I’m not sure what they were. Some of my sub-dependencies had already jumped to Symfony 6 since moving to PHP 8, so I was getting some deprecations in Symfony’s code, and had to look at where they were coming from to figure out that I could ignore them.
I think Symfony has gotten better with the deprecations and other procedures since the more complicated move from 3 to 4. I’m still running without Symfony Flex, so some of the docs aren’t helpful and a few things are missed that may happen automatically with Flex, but I’ve been able to figure out what I’ve needed to do.