* @since 1.16.3. $altUserName was added in 1.19.
*/
public static function userLink( $userId, $userName, $altUserName = false ) {
- if ( $userName === '' ) {
+ if ( $userName === '' || $userName === false || $userName === null ) {
wfDebug( __METHOD__ . ' received an empty username. Are there database errors ' .
'that need to be fixed?' );
return wfMessage( 'empty-username' )->parse();