Help:Magic words

Magic words are strings of text that MediaWiki associates with a return value or function, such as time, site details, or page names. This page explains only the standard magic words; for a technical reference, see Manual:Magic words.

There are three general types of magic words:

• Behavior switches: these are usually written as uppercase words surrounded by double underscores, e.g. __FOO__.
• Variables: these are uppercase words surrounded by double braces, e.g. {{FOO}}. As such, they look a lot like templates.
• Parser functions: these take parameters and are either of the form {{foo:...}} or {{#foo:...}}, e.g. {{#invoke:...}}.

See also Help:Extension:ParserFunctions at https://www.mediawiki.org/wiki/Help:Extension:ParserFunctions

Variables and parser functions can use subst:, just like templates.

Page-dependent magic words will affect or return data about the current page (by default), even if the word is added through a transcluded template or included system message.

For exhaustive detail see https://www.mediawiki.org/wiki/Help:Magic_words

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