ފަންވަތް:When on basepage

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This is the

{{When on basepage}} meta-template. It helps other templates detect if they are on a basepage (i.e. a page whose name matches the pattern "x:x") subpage ("x:x/x") or subsubpage ("x:x/x/x").

An alternative way to detect whether a page is a subpage is to combine the parser functions #ifeq: and #titleparts. See Alternatives for simpler text below.

Usage

{{When on basepage |result if on a basepage (|result if on a subpage) (|result if on a subsubpage) (|page=pagename)}}

For example,

{{When on basepage|Basepage|Subpage}} on the page "User:Example" would return: Basepage
whilst on "User:Example/page" (or "User:Example/page/page", "User:Example/page/page/page", etc) it would return: Subpage

On a subsubpage such as "User:Example/page/page" (or "User:Example/page/page/page", etc),

{{When on basepage|Basepage|Subpage|Subsubpage}} would return: Subsubpage

Use an empty parameter to specify no action for a particular type of page.

{{When on basepage|Basepage||Subsubpage}} on "User:Example/page", for example, would return nothing, but would return "Subsubpage" if on "User:Example/page/page", "User:Example/page/page/page", etc (and "Basepage" if on "User:Example").

Handling equals-signs ("=")

Use numbered parameters if their values include equals-signs ("="), i.e.

{{When on basepage |1=basepage result (|2=subpage result) (|3=subsubpage result)}}

page parameter

The page parameter is included for testing/demonstration. For example:

{{When on basepage |(basepage result)|(subpage result)|page=User:Example/test}} Regardless of where the above is placed, it will return: (subpage result)
(because "User:Example/test" is a subpage). The page doesn't have to exist.

If page is left empty (|page=) or undefined, the page where the template is transcluded (i.e. purge rev-ID : -   b: c: m: n: q: s: t: w: wikt: ? – version all messages
$wgMagicWordsEn at CVS Language.php   meta:help:Variable, meta:Global variables

method a	method b	generates
↑ common namespaces [-2 - 15] / used at all MediaWiki projects ↓
{{ns:-2}}	{{ns:Media}}	މީޑިއާ
{{ns:-1}}	{{ns:Special}}	ޚާއްސަ
↑ (Main) – MediaWiki:Blanknamespace – ‏(މައި) ↓
{{ns:1}}	{{ns:Talk}}	ޚިޔާލު
{{ns:2}}	{{ns:User}}	މެމްބަރު
{{ns:3}}	{{ns:User_talk}}	މެމްބަރުގެ ވާހަކަ
{{ns:4}}	{{ns:Project}}	ވިކިޕީޑިއާ
{{ns:5}}	{{ns:Project_talk}}	ވިކިޕީޑިއާ ޚިޔާލު
{{ns:6}}	{{ns:Image}}	ފައިލު
{{ns:7}}	{{ns:Image_talk}}	ފައިލުގެ ޚިޔާލު
{{ns:8}}	{{ns:MediaWiki}}	މީޑިއާވިކީ
{{ns:9}}	{{ns:MediaWiki_talk}}	މިޑިއާވިކީ ޚިޔާލު
{{ns:10}}	{{ns:Template}}	ފަންވަތް
{{ns:11}}	{{ns:Template_talk}}	ފަންވަތުގެ ޚިޔާލު
{{ns:12}}	{{ns:Help}}	އެހީ
{{ns:13}}	{{ns:Help_talk}}	އެހީގެ ޚިޔާލު
{{ns:14}}	{{ns:Category}}	ޤިސްމު
{{ns:15}}	{{ns:Category_talk}}	ޤިސްމުގެ ޚިޔާލު
↑ reserved namespaces ↓
{{ns:16}}
{{ns:17}}
{{ns:98}}
{{ns:99}}
↑ custom namespaces ↓
{{ns:100}}		ނެރު
{{ns:101}}		ނެރު ޚިޔާލު
{{ns:102}}
{{ns:103}}
{{ns:104}}
{{ns:105}}
{{ns:106}}
{{ns:107}}
{{ns:121}}
{{ns:122}}
{{ns:127}}
{{ns:128}}
{{ns:2147483646}}
{{ns:2147483647}}
↑ variables ↓
{{CURRENTDAY}}	8
{{CURRENTDAY2}}	08
{{CURRENTDAYNAME}}	ހުކުރު
{{CURRENTDOW}}	5
{{CURRENTMONTH}}	11
{{CURRENTMONTHABBREV}}	ނޮވެމްބަރ
{{CURRENTMONTHNAME}}	ނޮވެމްބަރު
{{CURRENTMONTHNAMEGEN}}	ނޮވެމްބަރ
{{CURRENTTIME}}	01:46
{{CURRENTWEEK}}	45
{{CURRENTYEAR}}	2024
{{FULLPAGENAME}}	ފަންވަތް:When on basepage
{{FULLPAGENAMEE}}	%DE%8A%DE%A6%DE%82%DE%B0%DE%88%DE%A6%DE%8C%DE%B0:When_on_basepage 1‎
{{NAMESPACE}}	ފަންވަތް
{{NAMESPACEE}}	%DE%8A%DE%A6%DE%82%DE%B0%DE%88%DE%A6%DE%8C%DE%B0 1‎
{{NUMBEROFARTICLES}}	3,139
{{NUMBEROFFILES}}	931
{{PAGENAME}}	When on basepage
{{PAGENAMEE}}	When_on_basepage 1‎
{{SCRIPTPATH}}	/w 1‎
{{SERVER}}	//dv.wikipedia.org
{{SERVERNAME}}	dv.wikipedia.org
{{SITENAME}}	ވިކިޕީޑިއާ
↑ predefined templates ↓
{{FULLURL:}}
{{FULLURLE:}}
{{GRAMMAR:}}	GRAMMAR CVS /languages/
{{INT:}}
{{LC:}}
{{LCFIRST:}}
{{LOCALURL:}}
{{LOCALURLE:}}
{{MSG:}}
{{MSGNW:}}
{{NS:}}
{{PLURAL:}}
{{REVISIONID:}}
{{REVISIONID}}	-
{{SUBST:}}
{{UC:}}
{{UCFIRST:}}
1 this documentation displays this value LTR (left to right)
↑ | common reserved custom namespaces | variables | predefined templates | ↓

) is used. page also accepts variables, e.g.

{{When on basepage|(basepage result)|(subpage result)|page={{{page|}}} }}

Technical note

This template detects subpages in all namespaces, including those without the MediaWiki subpage feature enabled.

Alternatives for simpler text

A subpage can be detected without using another template, by instead using the title-splitting parser function #titleparts with #ifeq:

{{#ifeq:{{#titleparts:{{PAGENAME}}|1|1}}|{{PAGENAME}}
 | [...code if on a basepage...]
 | [...code if on a subpage...]
}}

For example, many templates can check if the page is a /sandbox version, by the similar markup with #ifeq and #titleparts:

{{#ifeq: {{#titleparts:{{PAGENAME}}|1|1}} | {{PAGENAME}}

| {{documentation}}

| {{template sandbox notice}}

}}

That simple logic works because Template:Template_sandbox_notice also checks the page name for "/sandbox" before displaying the sandbox notice; otherwise, any other subpage would show no extra text. By avoiding a template, and using a single #ifeq, then the processing uses only +2 expansion depth levels, rather than +7 levels, and avoids "wp:exceeded template limits" inside a complex /doc page.

See also