SQL Injection Cheat Sheet : Samples are provided to allow reader to get basic idea of a potential SQL Injection attack and almost every section includes a brief information about...
Mink : Mink is an open source acceptance test framework for web applications, written in PHP 5.3.
JpGraph : JpGraph is an Object-Oriented Graph creating library for PHP >= 5.1 The library is completely written in PHP and ready to be used in any PHP scripts (...
StaticGen : Top Open-Source Static Site Generators
Twig : The flexible, fast, and secure template language for PHP
This is a collection of known design patterns and some sample code how to implement them in PHP. Every pattern has a small list of examples (most of them from Zend Framework, Symfony2 or Doctrine2 as I'm most familiar with this software).