A PHP framework for web artisans
The Symfony PHP framework
Yii 2: The Fast, Secure and Professional PHP Framework
Open Source PHP Framework (originally from EllisLab)
Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs.
The HttpKernel component provides a structured process for converting a Request into a Response.
The HttpFoundation component defines an object-oriented layer for the HTTP specification.
High performance, full-stack PHP framework delivered as a C extension.