Template:Undo

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This template is intended to be useful for creating links to "undo" diffs. Note: not all revisions can be undone. Use this template with care.

Every version of a page has a revision ID, which you can find from the history of the page by looking at the link for the timestamp, which is of the form:

http[s]://en.wikipedia.org/w/index.php?title=SomePageName&oldid=442212827

The number after oldid= is the revision ID.

Given a page name and two revision IDs, you can construct links undo diffs.

Usage

{{Undo|page|oldid|diff|label}}

• page – The title of the page.
• oldid · undoafter – The base ID onto which the diff is generated.
• diff · undo – The ID or keyword that is used against the base ID.
• label – Text to display as link. No label will give an "undo" link.

Examples

• {{Undo|Wikipedia:Pagediff|204934693|204901573}}
  • undo
    • The page= parameter (parameter number 1) should be a name of a page, for instance Wikipedia:Pagediff.
    • The oldid= parameter (parameter number 2) should be the smaller revision number.
    • The diff= parameter (parameter number 3) should be the larger revision number.
• {{Undo|Wikipedia:Pagediff|204934693|204901573|revert an edit}}
  • revert an edit
    • The page= parameter (parameter number 1) should be a name of a page, for instance Wikipedia:Pagediff.
    • The oldid= parameter (parameter number 2) should be the smaller revision number.
    • The diff= parameter (parameter number 3) should be the larger revision number.
    • The label= parameter (parameter number 4) should be an alternate display for the link than just "undo"

See also

• {{Oldid}} – simplifies the case for linking to a known old version
• {{Diff}}
• {{Diff2}}
• {{Querylink}} – generic template to construct query strings
• diff utility – syntax highlight on wiki pages with mw:Extension:SyntaxHighlight GeSHi

TemplateData

A template that is intended to be useful for creating links to undo specific diffs.

Template parameters[Edit template data]

Parameter		Description	Type	Status
Page	page	The title of the page.	Page name	required
Oldid	oldid undoafter	The base ID onto which the diff is generated. Some number like "442212827" (without the quotes).	Number	required
Diff	diff undo	The ID or keyword that is used against the base ID.	Number	required
Label	label	Text to display as link. No label will give a numbered link. Default undo	Line	optional

The above documentation is transcluded from Template:Undo/doc. (edit | history)
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