This is the PHP 5 entry in the new Spring Into series. It is written in the unique, structured style of Spring Into books. Each chapter begins with introductory text, followed by a single-page or facing-page tutorial. Every chapter is semi-autonomous, and focuses on an example or set of examples allowing the reader to quickly learn and apply. The discussions are to the point and emphasize results without extraneous coding. In 350 pages, Spring Into PHP 5 is designed to give professionals the skills they need to be productive with PHP 5--quickly--by covering dozens of chunks in rapid-fire format. PHP is clearly emerging as the most popular language for the creation of web applications. PHP 5 is the next major revision of the language. It provides a top-notch object system that behaves the way traditional heavyweight languages do, as well as real exceptions. In addition to these language additions, PHP 5 offers robust XML processing, improved MySQL and SQLite database support and a large number of improvements to areas of efficiency, extensibility and security. According to Netcraft's August 2004 survey, over 16 million domains run PHP. By comparison, Netcraft reports 2.5 million domains running ASP.Net.