Editing Help:Variables

'''Variables''' are a type of '''Magic words''' a strings of text that Wiki software associates with a return value or function. There are three general types of magic words:

*'''Variables''': these are uppercase words surrounded by double braces, ''e.g.'' '''<code><nowiki>{{FOO}}</nowiki></code>'''. As such, they look a lot like [[Help:Templates|templates]]. Note that templates use pre set ''parameters'', that are parsed and cashed once you save the page, not each time you load it.
*'''Behavior switches''': these are uppercase words surrounded by double underscores, ''e.g.'' '''__FOO__''' used for adjusting the layout or behavior of the page and can often be used to specify desired omissions and inclusions in the content.
*'''Parser functions''': very similar to variables, but take one or more parameters. See also [http://www.mediawiki.org/wiki/Help:Extension:ParserFunctions Help:Extension:ParserFunctions] which offers great functionality for constructing advance templates.


Here are some useful magic words, for a full list see [http://www.mediawiki.org/wiki/Help:Magic_words Help:Magic words]

{| class="wikitable"
|-
! style="background:#A7C1F2" width=150px| Word
! style="background:#A7C1F2" | Description
|-
| <code><nowiki>__NOTOC__</nowiki></code>
| Hides the table of contents (TOC).
|-
| <code><nowiki>__FORCETOC__</nowiki></code>
| Forces the table of content to appear at its normal position (above the first header).
|-
| <code><nowiki>__TOC__</nowiki></code>
| Places a table of contents at the word's current position (overriding <code><nowiki>__NOTOC__</nowiki></code>). If this is used multiple times, the table of contents will appear at the first word's position. It is possible to suppress the auto-generated section numbers, if the proper class exists locally at [[MediaWiki:Common.css]], defined as <code>.tocnumber { display: none; }</code>. 
|}

{| class="wikitable" width=100%
|-
! style="background:#A7C1F2" width=150px | Variable
! style="background:#A7C1F2" | Output
! style="background:#A7C1F2" | Description
|-
| <code><nowiki>{{FULLPAGENAME}}</nowiki></code>
| {{FULLPAGENAME}}
| Namespace and page title.
|-
| <code><nowiki>{{PAGENAME}}</nowiki></code>
| {{PAGENAME}}
| Page title.
|-
| <code><nowiki>{{BASEPAGENAME}}</nowiki></code>
| {{BASEPAGENAME}}
| Page title excluding the current subpage and namespace ("Title/foo" on "Title/foo/bar").
For more complex splitting, use <code><nowiki>{{</nowiki>#titleparts<nowiki>}}</nowiki></code> from [http://www.mediawiki.org/wiki/Help:Extension:ParserFunctions#.23titleparts ParserFunctions extension].
|-
| <code><nowiki>{{SUBPAGENAME}}</nowiki></code>
| {{SUBPAGENAME}}
| The subpage title ("foo" on "Title/foo").
|-
| <code><nowiki>{{SUBJECTPAGENAME}}</nowiki></code>
| {{SUBJECTPAGENAME}}
| The namespace and title of the associated subject page.
|-
| <code><nowiki>{{TALKPAGENAME}}</nowiki></code>
| {{TALKPAGENAME}}
| The namespace and title of the associated talk page.
|}


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[[Category:Help|Variables]]