PHP, which is an acronym for PHP: Hypertext Preprocessor, is one of the most popular reflective programming languages available out there. Any site or app built on PHP will run on a given web server on the condition that a PHP module is activated, which renders the language truly universal and it’s not really a big surprise that there are a couple of million web servers that support it and hundreds of millions of PHP websites hosted on them. PHP is preferred over HTML owing to the fact that it permits you to create a responsive website with an enormous number of options. A PHP-based social network, for instance, will serve unique web content to each user even though the page URL will not change. In comparison, HTML websites are static and the content on the pages can be modified only manually. Just like any other piece of software, PHP has different versions and the version that was used whilst developing a certain website must be installed on the server so that the site can run correctly.