John Coggeshall is a PHP consultant and author who started losing sleep over PHP around five years ago. Lately you'll find him losing sleep meeting deadlines for books or online columns on a wide range of PHP topics. You can find his work online at O'Reilly Networks onlamp.com and Zend Technologies. John has also contributed to WROX Press' Professional PHP4 Programming and is currently in progress writing PHP5 Unleashed by Sams Publishing.