Web Design Dictionary - A free glossary of web site design terms.
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  In programming, a function is a section of code that can be invoked from other sections of the code or from other pages. The main benefit is that code that would otherwise be repeated often in a site can be placed in a function and invoked when needed. This makes for neater code and easier maintenance.

In PHP, many pre-defined functions exist. See PHP.net for a complete list.

Last edited by Andre le Roux of http://www.logoground.com/
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