PHP is an open source, server-side, HTML-embedded web-scripting language for creating dynamic web pages. Not only browser-independent, PHP offers simple cross-platform solutions for e-commerce, and web and database-driven applications. Enter Professional PHP4. This book will show you exactly how to create fantastic web applications that scale well, utilize databases optimally, and connect to a back-end network using a multi-tiered approach. This book also teaches PHP by coding FTP and e-mail clients, advanced data structures, session management, and secure programming.