What is PHP?
PHP stays for Hypertext Preprocessor and is an open source server-side programming language that is used for running web scripts and for processing data passed via the CGI (Common Gateway Interface) from HTML forms etc. PHP can be written as scripts that reside on the server and may produce HTML output that downloads to the web browser. Alternatively, PHP can be embedded within HTML pages, which are saved with a .php file extension. The PHP sections of the page are then parsed by the PHP engine on the server and the PHP code stripped out before the page is downloaded to the web browser.