Introduction
PHP is a server-side scripting language and interpreter that is available on
a wide range of platforms, including some versions of Apache, and Microsoft's
Internet Information Server (IIS). The original program was called Personal Home
Page Tools, which is where the initials PHP come from. There are also a few other
definitions of the name, mostly thought up in retrospect. Some say that PHP is
a recursive three letter acronym meaning, PHP Hypertext Pre-processor. Another
generally accepted definition is Pre Hypertext Processor. The PHP script is embedded
in the Web page, and interpreted on the server before being sent to the client
who requested the page. PHP is open source, and may be downloaded from www.php.net.