Christian Wenz is a professional phrasemonger, author, trainer, and consultant with a focus on web technologies. He frequently contributes articles to renowned IT magazines and speaks at conferences around the globe. Christian contributes to several PHP packages in the PEAR repository and also maintains one Perl CPAN module. He holds a degree ("Diplom") in Computer Sciences from Technical University of Munich and lives and works in Munich, Germany. He also is Europe's very first Zend Certified Professional and founding principal at the PHP Security Consortium. He has written or cowritten more than four dozen books, including PHP 5 Unleashed and PHP Phrasebook.