John Coggeshall is a recognized expert in the PHP community. He is a columnist for the Zend Technologies Web site and the O'Reilly Network's onlamp.com. He is also a professional PHP developer who has worked with several large organizations. His column at Zend is called "The Code Gallery Spotlight," and focuses on explanations of complex pieces of code that are submitted to the code gallery at Zend.com. The O'Reilly column is for those with no Web development experience and describes PHP from the ground up.