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...
PHP Mini SQL Admin : Extremely lightweight alternative to heavy phpMyAdmin for quick and easy access MySQL databases.
HTML_QuickForm2 : This PHP package provides methods to create, validate and render HTML forms.
Phan : Phan is a static analyzer that looks for common issues and will verify type compatibility on various operations when type information is available or ...
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).