A guide to PHP essentials and the basics of object-oriented programming. Learn how to master MySQL, from database structure to complex queries; create web pages with PHP and MySQL by integrating forms and other HTML features; learn about JavaScript, from functions and event handling to accessing the Document Object Model; use libraries and packages, including the Smarty web template system, PEAR program repository, and the Yahoo User Interface Library; make Ajax calls and turn your website into a highly dynamic environment; and upload and manipulate files and images, validate user input, and secure your applications.