PHP is one of the most commonly used server-side programming languages. It is exceptionally popular since it’s free software, which you can use to develop interactive websites such as community sites, online stores or e-learning sites as opposed to static HTML websites. A PHP module must be installed on the server where a PHP website is hosted so that its source code can be ‘deciphered’. Since there aren’t any license fees for this kind of module and the language provides unlimited possibilities for the web apps that you develop, there are hundreds of millions of PHP websites. What’s more, there are an enormous number of PHP-based scripts, which you can use for your websites without the need to possess any programming experience. Since there’re a couple of PHP versions, you need to verify whether the very same version that you used whilst creating your website is available on the web server too.