Paul Michael Reinheimer (Waterloo, Ontario, Canada) is a Zend Certified Engineer currently developing Share The Beat (www.sharethebeat.com) an online music portal developed extensively in PHP. Paul has extensive PHP programming experience.
Chris Shiflett (NY, NY) is a frequent contributor to the PHP community and a leading security expert. He talks at conferences such as ApacheCon and the O'Reilly Open Source Convention, and publishes articles in PHP Magazine and php|architect. "Security Corner," his monthly column for php|architect, which is the industry's foremost PHP security column.