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It is slightly out of date for what wikitext parser functions can do.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

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
{{#switch: {{{1}}} | foo = Foo | Bar }}	local cases = { default = "Bar", foo = "Foo", } local pframe = frame: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

Math

Unlike in wikicode, lua does not use functions like ifexpr and expr. Add the lua operators and functions straight into your module.

Grouping

Wikicode	Lua
()	()

Numbers

Wikicode	Lua
1234.5	1234.5
2e3	2e3
pi	math.pi
e
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

Date and time

Wikicode	Lua
{{CURRENTYEAR}}	os.date( "%Y" )
{{CURRENTMONTH}}	os.date( "%m" )
{{CURRENTMONTHNAME}}	mw.getContentLanguage():formatDate( 'F' )
{{CURRENTMONTHNAMEGEN}}	mw.getContentLanguage():formatDate( 'xg' )
{{CURRENTMONTHABBREV}}	mw.getContentLanguage():formatDate( 'M' )
{{CURRENTDAY}}	os.date( "%e" )
{{CURRENTDAY2}}	os.date( "%d" )
{{CURRENTDOW}}	os.date( "%w" )
{{CURRENTDAYNAME}}	mw.getContentLanguage():formatDate( 'l' )
{{CURRENTTIME}}	os.date( "%R" )
{{CURRENTHOUR}}	os.date( "%H" )
{{CURRENTWEEK}}	mw.getContentLanguage():formatDate( 'W' )
{{CURRENTTIMESTAMP}}

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:page name}}
{{PROTECTIONLEVEL:edit}}	[Expensive] local protection = mw.title.getCurrentTitle().protectionLevels["edit"] table.concat(protection)
{{REVISIONID}}
{{REVISIONDAY}}
{{REVISIONDAY}}
{{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}}	mw.title.getCurrentTitle().prefixedText
{{PAGENAME}}	mw.title.getCurrentTitle().text
{{BASEPAGENAME}}	mw.title.getCurrentTitle().baseText
{{SUBPAGENAME}}	mw.title.getCurrentTitle().subpageText
{{SUBJECTPAGENAME}}	[Expensive] mw.title.getCurrentTitle().subjectPageTitle or an non expensive alternative: mw.title.getCurrentTitle().subjectNsText .. ":" .. mw.title.getCurrentTitle().text
{{TALKPAGENAME}}	[Expensive] mw.title.getCurrentTitle().talkPageTitle

Namespaces

Wikicode	Lua
{{NAMESPACE}}	mw.title.getCurrentTitle().nsText
{{NAMESPACENUMBER}}	mw.title.getCurrentTitle().namespace
{{SUBJECTSPACE}}	mw.title.getCurrentTitle().subjectNsText
{{TALKSPACE}}

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 )
#dateformat
{{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}}	mw.message.new( 'message' ):plain()
{{int:editsectionhint|MediaWiki}}	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 }}	frame:extensionTag( 'tagname', 'some text', { attribute1 = 'value1', attribute2 = 'value2' } )