PHP (Hypertext Preprocessor) is a server-side scripting language that is widely used for web development. It is an open-source language, meaning it is free to use and has a large community of developers who contribute to its development.
PHP is commonly used for creating dynamic web pages and web applications that interact with databases and other server-side technologies. PHP code is executed on the server-side, meaning it is processed and compiled by the web server before being sent to the client's web browser. This allows PHP to generate dynamic content on the fly, such as user authentication, form validation, and database interactions.