PHP is invented in 1995 by Rasmus Lerdorf. PHP is a server side scripting language embedded in HTML using C and Pearl Software. PHP is used to dynamic content, database, session tracking and to build e-commerce sites. PHP stands for Personal Home Page. It is cross platform i.e., it runs under any type of operating system. PHP is cross web server it runs under different web server it runs like Apache, IIS, Tomcat etc.