This document provides an overview of PHP, including its history, usage, syntax, frameworks, and more. PHP was created in 1994 by Rasmus Lerdorf as a general purpose scripting language especially suited for server-side web development. It allows developers to embed PHP code into HTML files to produce dynamic web pages. Major updates included support for object oriented programming, XML, and improved performance. PHP is a popular open source language used by over 240 million websites.