PHP is the world’s most popular open source web scripting language, installed on almost 17 million domains worldwide (www.php.net/usage.php). It is loved by beginners and embraced by advanced users. This book offers developers a complete guide to taking both defensive and proactive security approaches within their PHP applications. Pro PHP Security guides developers through many of the defensive and proactive security measures that can be taken to help prevent attackers from potentially disrupting site operation or destroying d ata. Moreover, this book covers a wide swath of security measures, showing readers how to create and deploy captchas, validate email, fend off SQL injection attacks, prevent cross-site scripting attempts, and more. About the Author Chris Snyder is employed at Fund for the City of New York (http://www.fcny.org/), where he develops next-generation websites and services for non-profit organizations. Michael Southwell is a retired English professor who has been developing websites for the past seven years. He’s the author/co-author of eight books and numerous articles on writing, writing and computers, and writing education. He is a Zend Certified Engineer.