I need to build a REST API in PHP, what framework could you recommend me?

Lumen (https://lumen.laravel.com) looks fast and relatively simple.

has anyone ever used Api Platform? (https://api-platform.com) What are your thoughts on it?

Is not using REST and option? Look into GraphQL, it's a really cool alternative

I keep recommending Phalcon, blame me for that but I just think it's the best.

Here's a doc on creating a REST API with it: https://docs.phalconphp.com/en/3.2/...

iunno, perhaps this?
https://github.com/thephpleague/...

I’m more of a native guy myself rather then taking on baggage from a framework.

API layers should be as close to instant as possible for returning the necessary data.

@Froot I've asked and GraphQL is allowed. (:

@Kage Superb! Look into it, it's really good!

Laravel 5 is a good option

@julioburgos wouldn't Lumen be a better option considering it's a micro-framework powered by Laravel?

I think you should try and do it without a framework. It really is not that complex with php at least, another thing that you could do is apply Phalcon (it is actually an extension) like someone else said and you can build one reaaaally fast.