What is PHP? * PHP stands for PHP: Hypertext Preprocessor * PHP is a server-side scripting language, like ASP * PHP scripts are executed on the server * PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.) * PHP is an open source software * PHP is free to download and use What is a PHP File? * PHP files can contain text, HTML tags and scripts * PHP files are returned to the browser as plain HTML * PHP files have a file extension of ".php", ".php3", or ".phtml"