PHP is a server-side scripting language designed for website development and it is also used as a general purpose programming language. PHP is installed on more than 244 million websites and more than 2.1 million web servers. Created by Rasmus Lerdorf in 1995, PHP originally stood for pre-hypertext processor. It now stands for PHP: Hypertext Preprocessor, which is a recursive acronym. PHP code is interpreted by a web server with a PHP processor module installed, which generates the resulting web page. PHP commands can be embedded directly inside an HTML document. PHP has also evolved to include a command-line interface and can be used in standalone graphical applications. PHP is free software released under the PHP License. PHP can be deployed on almost any web server and also as a standalone shell on almost every operating system and platform.