phabel VS unleash-client-php

Yeah I'm aware of Rector, there's a funny story here, I actually created https://github.com/phabelio/phabel which does the same thing as Rector, but @ installation time (fully integrated with Composer!): I created because I simply did not know about its existence, or else I would've just used it, instead :)

Rector is a very nice project, but I still haven't gotten around to integrating it into our codebase at work, because it uses phpstan instead of Psalm, and apart from being slower than Psalm, phpstan kept having various issues and crashes while scanning our codebase, unlike Psalm which mostly worked out of the box (I even became maintainer of Psalm, due to the large amount of additional performance improvements I added due to our needs @ work).

I have found this: https://github.com/phabelio/phabel but it only handles up to PHP 8.0.

This is a nice feature to have, but doesn't have provide "repeatable randomness", meaning, if you want 10% of your users with the flag enabled, the same 10% should be selected every time. If you're A/B testing a new feature that spans multiple API endpoints, for example, all endpoints should be using the same feature. The Unleash library provides this functionality, however.

It's available at https://github.com/Unleash/unleash-client-php.

That's what projects like these are great for. I always release my packages for all currently supported versions. When I was writing unleash/client I didn't really want to write 7.3 code so I started researching my options. Long story short the code is written in PHP 8 but can be installed on 7.3+ thanks to Rector (though it was a little bumpy from time to time, but u/Tomas_Votruba and others from the team are really fast when there's an issue).