Develop PHP
Glossary

PHP : as it applies to web development technology

PHP is an acronym for Hypertext Preprocessor. PHP is a dynamic server side scripting language that allows an application developer to create very simple to very complex software applications. PHP is primarily used for creating internet applications and complex web site systems. PHP comes equipped with a handy family of functions for interacting with databases, as well as many other libraries made for common programming tasks. PHP has over 700 built in functions to make a programmer's life easier.

PHP can also be used off of the web on machines and computers where PHP is installed and configured. For instance you can use PHP to create custom software that operates on your computer, and not online.

For more information about PHP see the reference link below:
http://www.developphp.com/view_lesson.php?v=192