Flat-files and plain-old PHP functions rockin'on as a set of general purpose high-level abstractions.
The HttpFoundation component defines an object-oriented layer for the HTTP specification.
The Symfony PHP framework
The HttpKernel component provides a structured process for converting a Request into a Response.
The Routing component maps an HTTP request to a set of configuration variables.
A PHP framework for web artisans
Yii 2: The Fast, Secure and Professional PHP Framework
Biny is a tiny, high-performance PHP framework for web applications