PHP and MySQL Web Development teaches the reader to develop dynamic, secure, commerical Web sites. Using the same accessible, popular teaching style of the three previous editions, this book has been thoroughly updated to reflect the rapidly changing landscape of MySQL and PHP. This fourth edition incorporates changes in the 5.1 specs of PHP and MySQL, as well as reflecting new trends in Web development in general. Some new highlights include coverage of Ajax, social networking sites, security concerns, and the PEAR repository of PHP extensions and applications.PHP and MySQL Web Development teaches you to develop dynamic, secure, commerical Web sites. Using the same accessible, popular teaching style of the three previous editions, this book has been thoroughly updated to reflect the rapidly changing landscape of MySQL and PHP. The fourth edition of PHP and MySQL Web Development includes updated examples and coverage of recent versions of PHP 5.1, new coverage of PHP security and Web 2.0 social networks, and advance information on the features of the forthcoming PHP 6, including Unicode and new object-oriented functionality.