PHP was created by Rasmus Lerdorf in 1994 and was publicly released in June 1995. Back then, it was the abbreviated form of Personal Home Page tools. After two years, in 1997, it entered public domain as PHP/F1 2.0. A year later, two programmers, Zeev Suraski and Andi Gutmans, rewrote the base of the original version and launched PHP 3.
PHP 4, which came out in 2000, incorporated a scripting engine named Zend Engine that was designed by Suraski and Gutmans. Three more major versions with some sub-versions were launched in the later years with the latest version 7.0 released in 2015.
Two decades after its inception, PHP has registered a phenomenal growth and is still going strong. Today, it controls over 80% of all the websites on the globe. This includes majors like Facebook, Wikipedia and WordPress among others.