Doctrine Common
A library that provides extensions to core PHP functionality
...Class loading is an essential part of any PHP application that makes heavy use of classes and interfaces. Unfortunately, a lot of people and projects spend a lot of time and effort on custom and specialized class loading strategies. It can quickly become a pain to understand what is going on when using multiple libraries and/or frameworks, each with its own way to do class loading. Class loading should be simple and it is an ideal candidate for convention over configuration. The Doctrine Common ClassLoader implements a simple and efficient approach to class loading that is easy to understand and use. ...