Php is a web development language.Defenition of php(Hypertext Preprocessor),it is createted for web development,it embedded into html.
The father of php by Rasmus Lerdorf in 1995
Simple Meaning of php
Hypertext Preprocessor
server-side scripting language
Srcipt are executed on the server
Supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.)
Open source software
Free to download and use