William Candillon is a twenty years old engineering student at Telecom Lille 1 in France. He is involved in the PHP community with two open source projects: phpAspect and PHP Parse Tree. phpAspect is a PHP language extension to implement Aspect-Oriented Programming. PHP Parse Tree is a C written module for PHP to generate xml abtract tree from a php source code. It allows php developers to perform static source code analysis of php applications and to use the power of xslt and xpath to perform source code transformations.