PHP, which is an abbreviation for PHP: Hypertext Preprocessor, is amongst the most widely used general-purpose scripting languages out there. Any website or app built on PHP will run on a given server provided that a PHP module is activated, which makes the language absolutely universal and it’s not really a huge surprise that there are actually a couple of million servers that support it and 100s of millions of PHP-powered sites hosted on them. PHP is preferred over HTML owing to the fact that it allows you to create an interactive website with a myriad of different features. A PHP-based community site, for example, will display unique content to each visitor regardless of the fact that the page URL will be the same. By contrast, HTML sites are static and the content on the pages can be edited only manually. Like any other software program, PHP has several versions and the version that was used while developing a particular website must be enabled on the web server so that the site can run flawlessly.