Extension:UserMerge

User Merge and Delete extension allows wiki users with the usermerge permission (Bureaucrat by default) to merge one Wiki user's account with another Wiki user's account.

The extension allows you to
 * merge a first account A with a second account B
 * delete the first account A after merging (option)
 * you may not delete a user without merging first.
 * omitting the "New User" field will auto-populate the New User as "Anonymous", user_id 0 and ask you to confirm merge to Anonymous.
 * the extension creates a User Merge log and logs all User Merge extension activity since version 1.2.

Installation

 * Download and extract the extension to your extensions folder
 * Add the following code to your LocalSettings.php (at the bottom)

Usage

 * follow Installation Instructions
 * a new Special Page Special:UserMerge with the title Merge and Delete Users is created
 * unmergeable users can be defined (examples):