PHP is a programming language mostly used to create Web Applications. As a language, it had a humble beginning. It was first created in 1994 by Rasmus Lerdorf to create his personal website. He didn’t know at the time it would eventually become one of the most popular programming languages in the world. It became popular later on, in 1997/8, and exploded in the 2000s when PHP 4 landed. PHP can be used to add little interactivity to an HTML page. 6 Or it can be used as a Web Application engine that creates HTML pages dynamically and sends them to the browser. It can scale to millions of page views.