PHP is one of the most widely used dynamic programming languages. It’s quite popular as it is free software, which can be used to set up responsive sites like social networking sites, e-commerce portals or online teaching sites instead of static HTML sites. A PHP module should be present on the web server where a PHP website is hosted so that its source code can be ‘decoded’. As there aren’t any license charges for such a module and the language provides unlimited options for the web-based apps that you build, there’re 100s of millions of PHP-driven sites. Furthermore, there’re numerous open-source PHP-based scripts, which you can use for your websites without the need to possess any programming abilities. As there are several versions of PHP, you need to make sure that the same exact version that you used whilst creating your website is installed on the web server too.