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Wiki How:Comparable Lua functions to wikitext

This is a list of Lua functions and the wikitext parser functions and magic words that they are comparable to.

It is slightly out of date for what wikitext parser functions can do.

Parser functions edit

WikitextLua
{{#if:x |not empty |empty}}
if x then    'not empty'else    'empty'end
{{#ifeq:x |y |identical |different}}
if x == y then    'identical'else    'different'end
{{#iferror:function |bad |good}}
 if tostring(mw.getCurrentFrame():preprocess('function')):find('<strong class="error"') then    'bad'else    'good'end
{{#ifexpr:1+2=3 |true|false}}
if 1 + 2 == 3 then    'true'else    'false'end
[Expensive]
{{#ifexist:namespace:title |exists |doesn't exist}}
[Expensive]
if mw.title.new('title', 'namespace').exists == true then    "exists"else    "doesn't exist"end
{{#rel2abs:path |basepath}}
{{#switch:{{{1}}} |foo=Foo |Bar}}
local cases = {    default = "Bar",    foo = "Foo",}local pframe = mw.getCurrentFrame():getParent()local arg = pframe.args[1]cases[arg] or cases["default"]
{{#time:format |timestamp}}
mw.getContentLanguage():formatDate('format', 'timestamp')
{{#timel:format |timestamp}}
mw.getContentLanguage():formatDate('format', 'timestamp', 1)
{{#titleparts:pagename |number of segments to return |first segment to return}}

Math edit

Unlike in wikicode, Lua does not use functions like #ifexpr and #expr. Add the Lua operators and functions straight into your module. See mw:Help:Calculation for details on how #expr and mw.ext.ParserFunctions.expr() evaluates expressions.

Grouping
WikicodeLua
()()
Numbers
WikicodeLua
1234.51234.5
2e32e3
pimath.pi
emath.exp(1)
2+22+2
2-12-1
Unary
WikicodeLua
notnot
ceil1.2math.ceil(1.2)
trunc
floor1.2math.floor(1.2)
abs-2math.abs(-2)
exp43math.exp(43)
ln2math.log(2)
cos0.1math.cos(0.1)
tan0.1math.tan(0.1)
acos0.1math.acos(0.1)
asin0.1math.asin(0.1)
atan0.1math.atan(0.1)
Binary
WikicodeLua
2^32^3
2*32*3
2/3
2div3		2/3
30mod730%7
+22
-2-2
Logic
WikicodeData typeLuaData type
3.0=3Integer (0 or 1)3.0==3Boolean (true or false)
3!=4
3<>4		Integer3~=4Boolean
4>3Integer4>3Boolean
4>=3Integer4>=3Boolean
3<=4Integer3<=4Boolean
3<=4Integer3<=4Boolean
andIntegerandBoolean
orIntegerorBoolean

Magic words edit

Date and time edit

WikicodeLua
{{CURRENTYEAR}}
mw.getContentLanguage():formatDate("Y")
or
os.date("!%Y")
{{CURRENTMONTH}}
{{CURRENTMONTH2}}
mw.getContentLanguage():formatDate("m")
or
os.date("!%m")
{{CURRENTMONTH1}}
mw.getContentLanguage():formatDate("n")
or
("%d"):format(os.date("!%m"))
{{CURRENTMONTHNAME}}
mw.getContentLanguage():formatDate("F")
or (if the wiki's language is set to English):
os.date("!%B")
{{CURRENTMONTHNAMEGEN}}
mw.getContentLanguage():formatDate("xg")
or (if the wiki's language is set to English):
os.date("!%B")
{{CURRENTMONTHABBREV}}
mw.getContentLanguage():formatDate("M")
or (if the wiki's language is set to English):
os.date("!%b")
{{CURRENTDAY}}
mw.getContentLanguage():formatDate("j")
or
("%d"):format(os.date("!%d"))
{{CURRENTDAY2}}
mw.getContentLanguage():formatDate("d")
or
os.date("!%d")
{{CURRENTDOW}}
mw.getContentLanguage():formatDate("w")
or
os.date("!%w")
{{CURRENTDAYNAME}}
mw.getContentLanguage():formatDate("l")
or (if the wiki's language is set to English):
os.date("!%A")
{{CURRENTTIME}}
mw.getContentLanguage():formatDate("H:i")
or
os.date("!%R")
{{CURRENTHOUR}}
mw.getContentLanguage():formatDate("H")
or
os.date("!%H")
{{CURRENTWEEK}}
("%d"):format(mw.getContentLanguage():formatDate("W"))
or
("%d"):format(os.date("!%V"))
{{CURRENTTIMESTAMP}}
mw.getContentLanguage():formatDate("YmdHis")
or
os.date("!%Y%m%d%H%M%S")
{{LOCALYEAR}}
mw.getContentLanguage():formatDate("Y", nil, true)
or
os.date("%Y")
{{LOCALMONTH}}
{{LOCALMONTH2}}
mw.getContentLanguage():formatDate("m", nil, true)
or
os.date("%m")
{{LOCALMONTH1}}
mw.getContentLanguage():formatDate("n", nil, true)
or
("%d"):format(os.date("%m"))
{{LOCALMONTHNAME}}
mw.getContentLanguage():formatDate("F", nil, true)
or (if the wiki's language is set to English):
os.date("%B")
{{LOCALMONTHNAMEGEN}}
mw.getContentLanguage():formatDate("xg", nil, true)
or (if the wiki's language is set to English):
os.date("%B")
{{LOCALMONTHABBREV}}
mw.getContentLanguage():formatDate("M", nil, true)
or (if the wiki's language is set to English):
os.date("%b")
{{LOCALDAY}}
mw.getContentLanguage():formatDate("j", nil, true)
or
("%d"):format(os.date("%d"))
{{LOCALDAY2}}
mw.getContentLanguage():formatDate("d", nil, true)
or
os.date("%d")
{{LOCALDOW}}
mw.getContentLanguage():formatDate("w", nil, true)
or
os.date("%w")
{{LOCALDAYNAME}}
mw.getContentLanguage():formatDate("l", nil, true)
or (if the wiki's language is set to English):
os.date("%A")
{{LOCALTIME}}
mw.getContentLanguage():formatDate("H:i", nil, true)
or
os.date("%R")
{{LOCALHOUR}}
mw.getContentLanguage():formatDate("H", nil, true)
or
os.date("%H")
{{LOCALWEEK}}
("%d"):format(mw.getContentLanguage():formatDate("W", nil, true))
or
("%d"):format(os.date("%V"))
{{LOCALTIMESTAMP}}
mw.getContentLanguage():formatDate("YmdHis", nil, true)
or
os.date("%Y%m%d%H%M%S")

Technical metadata edit

WikicodeLua
{{SITENAME}}
mw.site.siteName
{{SERVER}}
mw.site.server
{{SERVERNAME}}
{{DIRMARK}}
mw.language.getContentLanguage():getDirMark()
{{SCRIPTPATH}}
mw.site.scriptPath
{{STYLEPATH}}
mw.site.stylePath
{{CURRENTVERSION}}
mw.site.currentVersion
{{CONTENTLANGUAGE}}
mw.getContentLanguage():getCode()
{{PAGEID}}
mw.title.getCurrentTitle().id
{{PAGESIZE:pagename}}
{{PAGESIZE:pagename|R}}
mw.getContentLanguage():formatNum(mw.title.new(pagename):getContent():len())
mw.title.new(pagename):getContent():len()
{{PROTECTIONLEVEL:edit}}
[Expensive]
{{PROTECTIONLEVEL:action|pagename}}
table.concat(mw.title.getCurrentTitle().protectionLevels["edit"])
[Expensive]
table.concat(mw.title.new(pagename).protectionLevels[action])
[Expensive]
{{CASCADINGSOURCES}}
{{CASCADINGSOURCES:pagename}}
[Expensive]
table.concat(mw.title.getCurrentTitle().cascadingProtection.sources, "|")
table.concat(mw.title.new(pagename).cascadingProtection.sources, "|")
{{REVISIONID}}
{{REVISIONDAY}}
{{REVISIONDAY2}}
{{REVISIONMONTH}}
{{REVISIONMONTH1}}
{{REVISIONYEAR}}
{{REVISIONTIMESTAMP}}
{{REVISIONUSER}}
{{DISPLAYTITLE:title}}
{{DEFAULTSORT:sortkey}}

Statistics edit

WikicodeLua
{{NUMBEROFPAGES}}
mw.site.stats.pages
{{NUMBEROFARTICLES}}
mw.site.stats.articles
{{NUMBEROFFILES}}
mw.site.stats.files
{{NUMBEROFEDITS}}
mw.site.stats.edits
{{NUMBEROFVIEWS}}
mw.site.stats.views
{{NUMBEROFUSERS}}
mw.site.stats.users
{{NUMBEROFADMINS}}
mw.site.stats.admins
{{NUMBEROFACTIVEUSERS}}
mw.site.stats.activeUsers
[Expensive]
{{PAGESINCATEGORY:categoryname}}
[Expensive]
mw.site.stats.pagesInCategory('categoryname')
{{NUMBERINGROUP:groupname}}
mw.site.stats.usersInGroup('groupname')

Page names edit

WikicodeLua
{{FULLPAGENAME}}
{{FULLPAGENAMEE}}
mw.title.getCurrentTitle().prefixedText
mw.uri.encode(mw.title.getCurrentTitle().prefixedText, "WIKI")
{{PAGENAME}}
{{PAGENAMEE}}
mw.title.getCurrentTitle().text
mw.uri.encode(mw.title.getCurrentTitle().text, "WIKI")
{{BASEPAGENAME}}
{{BASEPAGENAMEE}}
mw.title.getCurrentTitle().baseText
mw.uri.encode(mw.title.getCurrentTitle().baseText, "WIKI")
{{ROOTPAGENAME}}
{{ROOTPAGENAMEE}}
mw.title.getCurrentTitle().rootText
mw.uri.encode(mw.title.getCurrentTitle().rootText, "WIKI")
{{SUBPAGENAME}}
{{SUBPAGENAMEE}}
mw.title.getCurrentTitle().subpageText
mw.uri.encode(mw.title.getCurrentTitle().subpageText, "WIKI")
{{SUBJECTPAGENAME}}
{{ARTICLEPAGENAME}}

{{SUBJECTPAGENAMEE}}
{{ARTICLEPAGENAMEE}}
[Expensive]
mw.title.getCurrentTitle().subjectPageTitle

or a non-expensive alternative:

mw.title.getCurrentTitle().subjectNsText .. ':' .. mw.title.getCurrentTitle().text
[Expensive]
mw.uri.encode(mw.title.getCurrentTitle().subjectPageTitle, "WIKI")

or a non-expensive alternative:

mw.uri.encode(mw.title.getCurrentTitle().subjectNsText .. ':' .. mw.title.getCurrentTitle().text, "WIKI")
{{TALKPAGENAME}}
{{TALKPAGENAMEE}}
[Expensive]
mw.title.getCurrentTitle().talkPageTitle
mw.uri.encode(mw.title.getCurrentTitle().talkPageTitle, "WIKI")

Namespaces edit

WikicodeLua
{{NAMESPACE}}
{{NAMESPACEE}}
mw.title.getCurrentTitle().nsText
mw.uri.encode(mw.title.getCurrentTitle().nsText, "WIKI")
{{NAMESPACENUMBER}}
mw.title.getCurrentTitle().namespace
{{SUBJECTSPACE}}
{{ARTICLESPACE}}
{{SUBJECTSPACEE}}
{{ARTICLESPACEE}}
mw.title.getCurrentTitle().subjectNsText

mw.uri.encode(mw.title.getCurrentTitle().subjectNsText, "WIKI")
{{TALKSPACE}}
{{TALKSPACEE}}
mw.site.namespaces[title.namespace].talk.canonicalName
mw.uri.encode(mw.site.namespaces[title.namespace].talk.canonicalName, "WIKI")

URL data edit

WikicodeLua
{{localurl:page|query}}
mw.uri.localUrl('page', 'query')
{{fullurl:page|query}}
mw.uri.fullUrl('page', 'query')
{{canonicalurl:page|query}}
mw.uri.canonicalUrl('page', 'query')
{{filepath:file name}}
{{urlencode:string|QUERY}}
mw.uri.encode('string', QUERY)
{{anchorencode:string}}
mw.uri.anchorEncode('string')

Namespaces edit

WikicodeLua
{{ns:0}}
mw.site.namespaces[0].name
{{ns:Project}}
mw.site.namespaces.Project.name

Formatting edit

WikicodeLua
{{formatnum:number}}
mw.getContentLanguage():formatNum(number)
{{#formatdate:date}}
{{#dateformat:date|format}}
{{lc:string}}
mw.ustring.lower('string')
{{lcfirst:string}}
mw.getContentLanguage():lcfirst('string')
{{uc:string}}
mw.ustring.upper('string')
{{ucfirst:string}}
mw.getContentLanguage():ucfirst('string')
{{padleft:xyz|stringlength}}
{{padright:xyz|stringlength}}

Localisation edit

WikicodeLua
{{plural:2|is|are}}
mw.getContentLanguage():plural(2, 'is', 'are')
{{grammar:N|noun}}
mw.getContentLanguage():grammar('N', 'noun')
{{gender:username|male|female|neutral}}
mw.getContentLanguage():gender('username', { 'male', 'female', 'neutral' })
{{int:message}}
{{int:editsectionhint|MediaWiki}}
mw.message.new('message'):plain()
mw.message.new('editsectionhint', 'MediaWiki'):plain()

Miscellaneous edit

WikicodeLua
 {{#language:code|inlanguage}}
mw.language.fetchLanguageName('code', 'inLanguage')
{{#special:special page name}}
{{#speciale:special page name}}
{{#tag:tagname |some text |attribute1=value1 |attribute2=value2}}
mw.getCurrentFrame():callParserFunction('#tag', { 'tagname', 'some text', attribute1 = 'value1', attribute2 = 'value2' })
mw.getCurrentFrame():extensionTag('tagname', 'some text', { attribute1 = 'value1', attribute2 = 'value2' })
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