Template:If in page/sandbox

__EXPECTUNUSEDTEMPLATE__This is the template sandbox page for Template:If in page (diff).
See also the companion subpage for test cases.

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This template is used on approximately 14,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them.

This template uses Lua:

Module:If in page (sandbox)

This template searches the current page for a provided Lua mw.ustring pattern. If you need help with these, you could ask Wikipedia talk:Lua, Wikipedia:Village pump (technical), or a user who knows Lua.

Note: the pattern is parsed by MediaWiki before being sent to the module, this means templates and magic words are decoded. If you want to add a | pipe character use {{!}}.

Usage

{{If in page |pattern |value if present |value if absent}} searches the current page for a given pattern
{{If in page |pattern |value if present |value if absent |page=page}} can be used to search a page other than the current page
{{If in page |pattern |value if present |value if absent |sub=yes}} if the pattern matches, substitutes %1, %2, %3, etc. in value if present with first, second, third, etc. capture groups. Does not work with %0.

Examples

{{If in page |%{%{[Uu]se British English%}%}|colour|color}} would output colour if a page contains {{Use British English}} or color if it does not

TemplateData

This is the TemplateData for this template used by TemplateWizard, VisualEditor and other tools. See a monthly parameter usage report for Template:If in page in articles based on its TemplateData.

TemplateData for If in page

No description.

Template parameters[Edit template data]
Parameter		Description	Type	Status
Pattern	`1`	A valid pattern for mw.ustring.match	Unknown	required
Value if present	`2`	The value to output if the pattern matches the content of the page	Content	suggested
Value if absent	`3`	The value to output if the pattern does not match the content of the page	Content	suggested
Page	`page`	The page to search, if not the current page	Unknown	optional
sub	`sub`	If set, then value if present will have %n replaced with capture groups, see doc	Boolean	optional

The above documentation is transcluded from Template:If in page/doc.
Editors can experiment in this template's sandbox and testcases pages.
Add categories to the /doc subpage. Subpages of this template.