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...
Pimple : Pimple is a small Dependency Injection Container for PHP 5.3 that consists of just one file and one class (about 50 lines of code).
Software Folklore : Sometimes bugs have symptoms beyond belief. This is a collection of such stories from around the web.
GetSimple CMS : GetSimple is an XML based, stand-a-alone, fully independant and lite Content Management System.
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).