a8d89189_eters_to_index_php___MediaWiki__Name
[Function] Clears the page's cache, forcing the page to be redisplayed from its source. This action is automatically performed for logged-in users. For non logged-in users, the action is performed only if requested via a POST request; otherwise, a form to confirm purging is shown (pressing the OK button posts the purge request, which is then executed). If accompanied by the optional forcelinkupdate parameter, the link table will also be updated. [Example] www.mediawiki.org/w/index.php?title=Project:Sandbox&action=purge www.mediawiki.org/w/index.php?title=Project:Sandbox&action=purge&forcelinkupdate [Name] 
purge
Manual:Parameters to index.php - MediaWiki