Backport PHP 8.1 support to 3.x

[GrahamCampbell]

I will handle this task next week. Related: 48557b5.

[nunomaduro]

@GrahamCampbell This can be closed, as we will be maintaining our own fork.

[xpader]

fork???

[GrahamCampbell]

Because we had to make breaking changes to get it to work, and the 4.x branch on this repo is already reserved for the FFI version, which is currently unsuitable for use with php-fpm.

[sorinsarca]

@GrahamCampbell can you tell me why is not (properly) working with php-fpm?
I've used php-fpm to test it and I had no issues

[nunomaduro]

FFI may work with PHP FPM, but it's simply not enabled by default.

[sorinsarca]

You mean the ffi extension?

[nunomaduro]

@sorinsarca Correct. Edited my previous comment.

[GrahamCampbell]

It's also very slow to initialize, and there have been no improvements to address told starts with fpm.

[sorinsarca]

It is slower in dev mode, when you don't use preloading. Try it with preload enabled

You just have to add in your preload file a single line

\Opis\Closure\Library::preload();

[xpader]

I think we still need no FFI version, or auto detect and use FFI when it's enabled.