This document provides an overview of PHP including its history, functionality, syntax, and installation/configuration process. PHP started in 1994 and was originally called Personal Home Page Tool. It is a widely used open source scripting language used for web development. The document outlines how to install PHP along with a web server (e.g. Apache) and database (e.g. MySQL). It also provides basic PHP code examples and discusses how to configure the software and run PHP scripts through a web browser.