Ticket #22309: trac22309_search_users_by_displayname.patch

wp-includes/user.php

@@ -488 +488 @@
                                 elseif ( preg_match('|^https?://|', $search) && ! wp_is_large_network( 'users' ) )
                                         $search_columns = array('user_url');
                                 else
-                                        $search_columns = array('user_login', 'user_nicename');
+                                        $search_columns = array('user_login', 'user_nicename', 'display_name', 'user_email');
                         }
 
                         $this->query_where .= $this->get_search_sql( $search, $search_columns, $wild );