PHP – Hypertext Preprocessor (earlier, it was Personal Home Page )
PHP is an HTML-embedded scripting language used to write dynamically generated pages quickly. It is open source software, created in 1995 by Rasmus Lerdorf and its scripts are executed on the server.
PHP files can contain text, HTML tags and scripts with a file extension of ".php". It can be used to create login pages, design a form, create forums, surveys, dynamic and static websites and many more.
A Sample PHP Script to print "Hello World" :-
echo 'Hello World!';