PHP is open source, and free to use and download. This is a big part of why it is so popular. PHP is used by huge websites like Facebook, Wikipedia, WordPress, and many more.
One of PHP’s strengths is its versatility. PHP is great for creating dynamic page content, but can do much more. It is used to code essential capabilities into websites, like file-handling functions on servers, including creating, opening, reading, editing, and deleting files. It can be used to collect form data, handle cookies, manage user access, and even to implement data encryption.
PHP is a multi-platform technology. It can run on Windows, Linux, Unix, Mac OS, and more. It supports different types of databases and will work with all the major server technologies, and is constantly being improved and updated.