PHP stands for Hypertext Preprocessor. It's an open source, server-side, scripting language used for the development of web applications. By scripting language, we mean a program that is script-based written for the automaton of tasks. It is used to manage dynamic content, databases, session tracking, even build entire e-commerce sites. It is integrated with a number of popular databases, including MYSQL, PostgreSQL, Oracle, Sybase, Informix, and Microsoft SQL Server.