Extension:WhosOnline

WhosOnline extension adds a special page - Special:WhosOnline - for viewing the list of users currently online.

Installation
Download the files from SVN, put them under $IP/extensions/WhosOnline and create the table online with the following SQL query:

Remember the $wgDBprefix in the tablename. Otherwise the extension will not work.

Then add the following line to LocalSettings.php to activate the extension: