PHP is a server side scripting language which stands for “Hypertext Preprocessor” and embedded with webpage and html code.Earliest version of this language was known as “Personal Home Page”.PHP is cross platform scripting language and an alternative of ASP(Active Server Page) and JSP(java server page). A web page in which php code included that must be saved with .php,.php3 or .phtml extensions,when a page with suffix .php,.php3 or .phtml is called via web server that is treated as dynamic page. Before page is displayed at user end that is interpretd by php and all php operation is executed.
<?php //opening tag ?--> // closing tag <? // short opening tag
for using short opening “tag short_open_tag” must be on in php.ini file.