Introduction --; I. PHP internals --; Strings --; Numbers --; Time and date --; Variables --; Arrays --; Functions --; Classes and objects --; Files and directories --; II. Applications --; Web page creation / XHTML / CSS --; Web form handling --; Data validation and standardization --; Sessions and user tracking --; Web services and other protocols --; Relational databases --; Other data storage methods --; Email --; XML --; Images --; Error reporting and debugging --; User authentication and encryption --; III. Appendices --; A. Migrating to PHP 5 B. SPL --; C. Common PHP error messages --; Index.