1e0db7de_eters_to_index_php___MediaWiki__Function
[Name] rollback [Example] www.mediawiki.org/w/index.php?title=Project:Sandbox&action=rollback&from=John&token=d7aaa6c\ [Function] 
Rollbacks the last edits made by the last editor of the page; in other words, it restores the last version of the article whose editor is not the last one. The edit is marked as minor and a default edit summary is used.[4] The following two other parameters are required: from is the username whose edits are to be reverted token is a rollback token; used to prevent users from being tricked into performing an unwanted rollback by following a link or clicking a button in an external website.
Manual:Parameters to index.php - MediaWiki