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<languages />
{{Magic words}}
{{outdated}}
<span lang="en" dir="ltr" class="mw-content-ltr">A "'''[[Special:MyLanguage/Help:Extension:ParserFunctions|parser function]]'''" is a [[Special:MyLanguage/Help:Templates|template]]-like construct that returns a value based on at least one unnamed parameter, separated from the function name by a colon [''':'''].</span>
<span lang="en" dir="ltr" class="mw-content-ltr">There may be more parameters, as well; like those of ordinary templates, these additional parameters are each preceded by a "pipe" ['''|'''].</span>
<span lang="en" dir="ltr" class="mw-content-ltr">In the case of a [[w:Number sign|hash character]] [#] at the start of the function name (which prevents collision with namespaces and interwiki prefixes), this may or may not be considered part of the name.</span>
<span lang="en" dir="ltr" class="mw-content-ltr">If it is considered part of the name, the syntax is of the form</span>

:<nowiki>{{</nowiki>''functionname'': ''argument 1'' | ''argument 2'' | ''argument 3''...}}

{{note|1=<span lang="en" dir="ltr" class="mw-content-ltr">If the caller has '''no arguments''' to provide the parser function, then the form is simply <nowiki>{{</nowiki>''functionname'':<nowiki>}}</nowiki> or, when a hash character applies (as is normally the case) then the form is <nowiki>{{</nowiki>''#functionname'':<nowiki>}}</nowiki>. If the trailing colon is not supplied, then ''functionname'' is not recognized by the parser.</span>}}

<div lang="en" dir="ltr" class="mw-content-ltr">
Arguments cannot directly contain "|" or "}}" except as part of the code of a template call, parser function call, variable, link or image, but they can contain them arbitrarily using a template, e.g., {{tim|!}}, or a parser function.
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
The code can specify whether the function name is case-sensitive.
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
The separation of the arguments from each other is with "|", and from the function name is with the first ":" The expansion of each of these pieces is standard, as in [[Special:ExpandTemplates]] (which is a good place to experiment, by the way, if you are learning this stuff) and is beyond the control of the parser function itself.
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
However, everything else can be different for each parser function, including:
*whether an argument is just a value, or of the form ''parname'' = ''parvalue'', or whatever
*if applicable, whether parameter names are case-sensitive
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
==Syntax prescribed by a parser function extension==
</div>
<span lang="en" dir="ltr" class="mw-content-ltr">In view of the above, it is advantageous to make an extension such that the syntax to be used in an argument does ''not'' contain the [[w:Vertical_bar|pipe character]] "|" or double braces (more specifically, double closing braces "}}" ).</span>
<span lang="en" dir="ltr" class="mw-content-ltr">This, in spite of the fact that a pipe character would otherwise seem a suitable symbol for, e.g., a choice or union (see, e.g., [http://semeb.com/dpldemo/index.php/Manual#category]).</span>
<span lang="en" dir="ltr" class="mw-content-ltr">Allowing such codes is harmless if an alternative code is also allowed, e.g. "\" for "|".</span>

<div lang="en" dir="ltr" class="mw-content-ltr">
==Table of functions==
</div>

{|class="sortable wikitable"
!<span lang="en" dir="ltr" class="mw-content-ltr">extension</span>!!<span lang="en" dir="ltr" class="mw-content-ltr">function</span>!!<span lang="en" dir="ltr" class="mw-content-ltr">MediaWiki version</span>
|-
|[[Special:MyLanguage/Help:Parser function#LC|built-in]]||lc||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#UC|built-in]]||uc||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#LCFIRST|built-in]]||lcfirst||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#UCFIRST|built-in]]||ucfirst||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#URLENCODE|built-in]]||urlencode||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#ANCHORENCODE|built-in]]||anchorencode||1.8+
|-
|[[Special:MyLanguage/Help:Parser function#URLs etc.|built-in]]||localurl||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#URLs etc.|built-in]]||fullurl||1.7+
|-
|[[Special:MyLanguage/Help:Parser function##language:|built-in]]||#language||1.7+
|-
|[[Special:MyLanguage/Help:Parser function#|built-in]]||#special||1.9+
|-
|[[Special:MyLanguage/Help:Parser function#|built-in]]||#tag||1.12+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##expr|usage}})||#expr||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##ifexpr|usage}})||#ifexpr||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##if|usage}})||#if||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##ifeq|usage}})||#ifeq||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##ifexist|usage}})||#ifexist||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##rel2abs|usage}})||#rel2abs||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##titleparts|usage}})||#titleparts||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##switch|usage}})||#switch||1.19+
|-
|{{ll|Extension:ParserFunctions|nsp=0}} ({{ll|Help:Extension:ParserFunctions##time|usage}})||#time||1.19+
|-
|{{ll|Extension:AddScriptCss|nsp=0}}||#addscript||Archived
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraydefine||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraydiff||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayindex||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayintersect||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraymerge||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayprint||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayreset||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraysearch||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraysearcharray||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraysize||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayslice||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraysort||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arraytohash||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayunion||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#arrayunique||1.23+
|-
|{{ll|Extension:Arrays|nsp=0}}||#hashtoarray||1.23+
|-
|{{ll|Extension:Attachments|nsp=0}}||#attach||1.31+
|-
|{{ll|Extension:Attachments|nsp=0}}||#exturl||1.31+
|-
|{{ll|Extension:Babel|nsp=0}}||#babel||1.30+
|-
|{{ll|Extension:CSS|nsp=0}}||#css||1.25+
|-
|{{ll|Extension:Coordinate|nsp=0}}||#coordinate||Archived
|-
|{{ll|Extension:Counter|nsp=0}}||#+||1.15+
|-
|{{ll|Extension:Data|nsp=0}}|||#data||Archived
|-
|{{ll|Extension:Data|nsp=0}}|||#sort||Archived
|-
|{{ll|Extension:DynamicFunctions|nsp=0}}|||#arg||Archived
|-
|{{ll|Extension:DynamicFunctions|nsp=0}}|||#ip||Archived
|-
|{{ll|Extension:DynamicFunctions|nsp=0}}|||#rand||Archived
|-
|{{ll|Extension:DynamicFunctions|nsp=0}}|||#skin||Archived
|-
|{{ll|Extension:DynamicPageList (third-party)|nsp=0}}||#dpl||Archived
|-
|{{ll|Extension:DynamicPageList3|nsp=0}}||#dpl||1.39+
|-
|{{ll|Extension:ExpandAfter|nsp=0}}||#expandafter ({{ll|Extension:ExpandAfter#Usage Note|deprecated}}, see: #tag)||Archived
|-
|{{ll|Extension:ForeachFunction|nsp=0}}||#foreachx||Archived
|-
|{{ll|Extension:ForeachFunction|nsp=0}}||#foreachy||Archived
|-
|{{ll|Extension:HasCategory|nsp=0}}||#ifhascat||Archived
|-
|{{ll|Extension:HideNamespace|nsp=0}}||#hidens||Archived
|-
|{{ll|Extension:HideNamespace|nsp=0}}||#unhidens||Archived
|-
|{{ll|Extension:ImageLink|nsp=0}}||#img (old: #imagelink, {{ll|Extension:ImageLink#Usage Note|deprecated}})||Archived
|-
|{{ll|Extension:Infobox Data Capture|nsp=0}}||#dataentry||Archived
|-
|{{ll|Extension:Infobox Data Capture|nsp=0}}||#listsplit||Archived
|-
|{{ll|Extension:InterWikiLinkManager|nsp=0}}||#iwl||Archived
|-
|{{ll|Extension:KeyValue|nsp=0}}||#keyvalue||Archived
|-
|{{ll|Extension:Labeled Section Transclusion|nsp=0}}||#lst||1.25+
|-
|{{ll|Extension:Labeled Section Transclusion|nsp=0}}||#lstx||1.25+
|-
|{{ll|Extension:Labeled Section Transclusion|nsp=0}}||#lsth||1.25+
|-
|{{ll|Extension:LoopFunctions|nsp=0}}||#for||1.23+
|-
|{{ll|Extension:LoopFunctions|nsp=0}}||#foreach||1.25+
|-
|{{ll|Extension:Loops|nsp=0}}||#while||1.25+
|-
|{{ll|Extension:Loops|nsp=0}}||#dowhile||1.25+
|-
|{{ll|Extension:Loops|nsp=0}}||#forargs||1.25+
|-
|{{ll|Extension:Loops|nsp=0}}||#fornumargs||1.25+
|-
|{{ll|Extension:Loops|nsp=0}}||#loop||1.25+
|-
|{{ll|Extension:Maps|nsp=0}}||#geocode||1.27+
|-
|{{ll|Extension:Maps|nsp=0}}||#display_map||1.27+
|-
|{{ll|Extension:Maps|nsp=0}}||#display_point||1.27+
|-
|{{ll|Extension:Maps|nsp=0}}||#coordinates||1.27+
|-
|{{ll|Extension:Maps|nsp=0}}||#distance||1.27+
|-
|{{ll|Extension:MediaFunctions|nsp=0}}||#media..||1.23+
|-
|{{ll|Extension:PageAfterAndBefore|nsp=0}}||#pagebefore||Archived
|-
|{{ll|Extension:PageAfterAndBefore|nsp=0}}||#pageafter||Archived
|-
|{{ll|Extension:PageAfterAndBefore|nsp=0}}||#firstpage||Archived
|-
|{{ll|Extension:PageAfterAndBefore|nsp=0}}||#lastpage||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#pagetitle||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#pagesubtitle||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#pageexists||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#varset||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#varget||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#varcapset||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#cshow||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#varaset||Archived
|-
|{{ll|Extension:PageFunctions|nsp=0}}||#varaget||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#expr (extended)||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#ifexpr (extended)||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#min||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#max||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#if||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#ifeq||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#ifexist||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#rel2abs||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#switch||Archived
|-
|{{ll|Extension:ParserFunctions (extended)|nsp=0}}||#time||Archived
|-
|{{ll|Extension:Pipe Escape|nsp=0}}||#!||1.23+
|-
|{{ll|Extension:QPoll|nsp=0}}||#qpuserchoice||Archived
|-
|{{ll|Extension:RegexTools|nsp=0}}||#regex||Archived
|-
|{{ll|Extension:RegexTools|nsp=0}}||#regex_vars||Archived
|-
|{{ll|Extension:Scribunto|nsp=0}}||#invoke||
|-
|{{ll|Extension:SecureProperties|nsp=0}}|||#pg||Archived
|-
|{{ll|Extension:SecureProperties|nsp=0}}|||#ps||Archived
|-
|{{ll|Extension:SecureProperties|nsp=0}}|||#pf||Archived
|-
|{{ll|Extension:SecureProperties|nsp=0}}|||#gg||Archived
|-
|{{ll|Extension:SecureProperties|nsp=0}}|||#gs||Archived
|-
|{{ll|Extension:Semantic MediaWiki|nsp=0}}||#ask||1.27+
|-
|{{ll|Extension:Semantic MediaWiki|nsp=0}}||#concept||1.27+
|-
|{{ll|Extension:Semantic MediaWiki|nsp=0}}||#info||1.27+
|-
|{{ll|Extension:Semantic MediaWiki|nsp=0}}||#show||1.27+
|-
|{{ll|Extension:Semantic MediaWiki|nsp=0}}||#set||1.27+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#len||1.7+ 
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#pos||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#rpos||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#sub||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#pad||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#replace||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#explode||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#urlencode||1.7+
|-
|{{ll|Extension:StringFunctions|nsp=0}}||#urldecode||1.7+
|-
|{{ll|Extension:TreeAndMenu|nsp=0}}|||#tree||1.23+
|-
|{{ll|Extension:TreeAndMenu|nsp=0}}|||#menu||1.23+
|-
|{{ll|Extension:Variables|nsp=0}}||#vardefine||1.29+
|-
|{{ll|Extension:Variables|nsp=0}}||#vardefineecho||1.29+
|-
|{{ll|Extension:Variables|nsp=0}}||#var||1.29+
|-
|{{ll|Extension:Variables|nsp=0}}||#varexists||1.29+
|-
|{{ll|Extension:Variables|nsp=0}}||#var_final||1.29+
|-
|{{ll|Extension:Wikibase Client|nsp=0}}||#property||
|-
|{{ll|Extension:Wikibase Client|nsp=0}}||#statements||
|-
|}

<div lang="en" dir="ltr" class="mw-content-ltr">
==See also==
</div>
*{{ll|Help:Magic words}}
*{{ll|Category:Parser function extensions}}
*{{ll|Manual:Parser functions|Writing parser functions}} (software development)
* Parser functions for Wikibase (the extensions that enables Wikidata): [[:d:Wikidata:How to use data on Wikimedia projects]]

[[Category:Customization techniques{{#translation:}}|{{PAGENAME}}]]
[[Category:Parser function extensions{{#translation:}}| ]]
[[Category:Extension examples{{#translation:}}| ]]