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Wikipedia:Comparable Lua functions to wikitext

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This is an old revision of this page, as edited by Uzume (talk | contribs) at 12:55, 21 February 2023 (→Technical metadata: fix). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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It is slightly out of date for what wikitext parser functions can do.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}} 
mw.getContentLanguage():formatDate( 'Y' )
or
os.date( "%Y" )
{{CURRENTMONTH}} 
mw.getContentLanguage():formatDate( 'm' )
or
os.date( "%m" )
{{CURRENTMONTH1}} 
mw.getContentLanguage():formatDate( 'n' )
{{CURRENTMONTHNAME}} 
mw.getContentLanguage():formatDate( 'F' )
{{CURRENTMONTHNAMEGEN}} 
mw.getContentLanguage():formatDate( 'xg' )
{{CURRENTMONTHABBREV}} 
mw.getContentLanguage():formatDate( 'M' )
{{CURRENTDAY}} 
mw.getContentLanguage():formatDate( 'j' )
{{CURRENTDAY2}} 
mw.getContentLanguage():formatDate( 'd' )
or
os.date( "%d" )
{{CURRENTDOW}} 
mw.getContentLanguage():formatDate( 'w' )
or
os.date( "%w" )
{{CURRENTDAYNAME}} 
mw.getContentLanguage():formatDate( 'l' )
{{CURRENTTIME}} 
mw.getContentLanguage():formatDate( 'H:i' )
or
os.date( "%R" )
{{CURRENTHOUR}} 
mw.getContentLanguage():formatDate( 'H' )
or
os.date( "%H" )
{{CURRENTWEEK}} 
mw.getContentLanguage():formatDate( 'W' )
{{CURRENTTIMESTAMP}} 
mw.getContentLanguage():formatDate( 'YmdHis' )

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])

{{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}} 
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'
} )
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