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Christian Wenz is a professional phrasemonger, author, trainer, and consultant with a focus on web technologies. He has written or cowritten more than one hundred books. He frequently contributes articles to renowned IT magazines and speaks at developer conferences around the globe. Christian contributes to several PHP libraries and frameworks and other open source software. He holds university degrees in computer sciences and in business informatics and lives and works in Munich, Germany. He also is one of the authors of Zend’s PHP 5 and PHP 5.3 certifications.