PHP is one of the most common and versatile web page scripting languages. It can create dynamic, object oriented sites that are capable of storing data and easily communicating with databases.
How do I know if I am using PHP?
If you are using WordPress, Joomla, Drupal, Dolphin, or one of several other common CMS’s then you are using PHP. You can always check by logging into your file manager and see what the file extension is.