Christian Wenz is a consultant, author, and trainer on web technologies, web performance, and web security. With his company Arrabiata Solutions GmbH, with offices in Munich and London, he makes web applications better performing, more visible, and more secure. Christian has written or co–written over 100 books for various publishers. He is the main author of the Zend PHP certification since version 5.3, contributes to several open source projects and is a fixture at IT conferences worldwide since 2003. This is his 12th ZendCon!