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It is slightly out of date for what wikitext parser functions can do.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

Wikitext Lua 
((#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

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
Wikicode Lua
() ()
Numbers
Wikicode Lua
1234.5 1234.5
2e3 2e3
pi math.pi
e math.exp(1)
2+2 2+2
2-1 2-1
Unary
Wikicode Lua
not not
ceil1.2 math.ceil(1.2)
trunc
floor1.2 math.floor(1.2)
abs-2 math.abs(-2)
exp43 math.exp(43)
ln2 math.log(2)
cos0.1 math.cos(0.1)
tan0.1 math.tan(0.1)
acos0.1 math.acos(0.1)
asin0.1 math.asin(0.1)
atan0.1 math.atan(0.1)
Binary
Wikicode Lua
2^3 2^3
2*3 2*3
2/3
2div3		 2/3
30mod7 30%7
+2 2
-2 -2
Logic
Wikicode Data type Lua Data type
3.0=3 Integer (0 or 1) 3.0==3 Boolean (true or false)
3!=4
3<>4		 Integer 3~=4 Boolean
4>3 Integer 4>3 Boolean
4>=3 Integer 4>=3 Boolean
3<=4 Integer 3<=4 Boolean
3<=4 Integer 3<=4 Boolean
and Integer and Boolean
or Integer or Boolean

Magic words[edit]

Date and time

Wikicode Lua 
((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

Wikicode Lua 
((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

Wikicode Lua 
((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

Wikicode Lua 
((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

Wikicode Lua 
((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

Wikicode Lua 
((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

Wikicode Lua 
((ns:0))

mw.site.namespaces[0].name

((ns:Project))

mw.site.namespaces.Project.name

Formatting

Wikicode Lua 
((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

Wikicode Lua 
((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

Wikicode Lua 
 ((#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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