Great! Thanks Horst and Phillipp, I've already used CodeIgniter and Yii. I will try Laravel next..

Well, depends on your project. If your project is in large scale, may be go to Symfony or Laravel. 

For API or small apps, use Lumen, Silex, or slim framework. 

nowadays recommend:

Laravel php framework is on the top of the list.

check:

https://laravel.com/

Yes, Laravel is the best php framework in terms of long-term future support and robustness

There is no actual best? There are several out there that serves different purposes, like CakePHP which can be good for RAD and Laravel for a cleaner and better approach so there is no exact best, only in terms of how you will use it.

I think the Symphony framework is the best

But one should not overlook the power and successive updates and powerful support of Laravel

But my suggestion is to you Laravel

This article listed some tips and and resources in getting the best PHP framework: https://designrshub.com/2013/02/php-framework.html