PHP is among the most widely used imperative programming languages. It’s very popular as it is free software, which you can use to build interactive websites like social networking sites, online shopping portals or online teaching sites instead of static HTML sites. A PHP module should be available on the server where a PHP-powered site is hosted so that its PHP code can be interpreted. As there are no license charges for this sort of module and the language offers unlimited options for the web apps that you develop, there’re hundreds of millions of PHP-powered sites. Also, there’re loads of PHP-based scripts, which you can use for your sites without the need to have any programming know-how. Considering the fact that there’re a number of versions of PHP, you need to check if the exact same version that you used whilst creating your site is enabled on the server too.