David Sklar is a Software Architect at Ning, and the author of PHP Cookbook (O'Reilly), Learning PHP 5 (O'Reilly), and Essential PHP Tools (Apress). He speaks at many conferences, keeps a blog at http://www.sklar.com/blog/, and maintains http://px.sklar.com/, a PHP code exchange he created in 1996. David has a degree in Computer Science from Yale University.