PHP, which is a metacronym for PHP: Hypertext Preprocessor, is one of the most famous web programming languages available out there. Any site or web application built using PHP will run on a given web server as long as a PHP module is activated, which makes the language truly universal and it’s little wonder that there are a few million web servers that support it and 100s of millions of PHP-driven websites running on them. PHP is preferred over HTML because of the fact that it enables you to build a dynamic site with a ton of options. A PHP-based community website, for instance, will display different web content to each visitor despite the fact that the page URL will be the same. In contrast, HTML-based websites are static and the content on the pages can be edited only manually. Like any other piece of software, PHP has several versions and the one that was used while developing a particular website must be set up on the server in order for the site to work correctly.