Manual:Hooks/RevisionFromEditComplete

Details

 * WikiPage edited
 * New revision
 * If the edit restores or repeats an earlier revision (such as a rollback or a null revision), the ID of that earlier revision. False otherwise. (Used to be called $baseID.)
 * Editing user
 * Tags to apply to the edit and recent change. This is empty, and replacement is ignored, in the case of import or page move.

This hook has replaced the deprecated hook.