PHP, which is an initialism for PHP: Hypertext Preprocessor, is amongst the most famous general-purpose programming languages available out there. Any website or web-based app written in PHP will run on a given server as long as a PHP module is activated, which renders the language absolutely universal and it’s not unusual that there are a few million servers that support it and hundreds of millions of PHP sites running on them. PHP is preferred over HTML because of the fact that it permits you to create a dynamic site with a ton of features. A PHP-based community web portal, for example, will display unique web content to each user regardless of the fact that the URL will be the same. By contrast, HTML-based sites are static and the page content can be modified only manually. Just like any other software program, PHP has different versions and the version that was used whilst creating a given website must be enabled on the web server in order for the site to behave correctly.