function delete_users($user_ids, $blog_id_arg = 0)
 {
     global $wpdb;
     if (!$user_ids) {
         return;
     }
     $user_ids = (array) $user_ids;
     $user_clause = "user_id IN ('" . implode("', '", $user_ids) . "')";
     if ($blog_id_arg) {
         $table_name = $blog_id_arg > 1 ? $wpdb->base_prefix . $blog_id_arg . '_' . 'user2role2object_rs' : $wpdb->base_prefix . 'user2role2object_rs';
     } else {
         $table_name = $wpdb->user2role2object_rs;
     }
     if (!$wpdb->get_results("SHOW TABLES LIKE '{$table_name}'")) {
         return;
     }
     scoper_query("DELETE FROM {$table_name} WHERE {$user_clause}");
     foreach ($user_ids as $user_id) {
         if (!MULTISITE || !scoper_get_site_option('mu_sitewide_groups')) {
             ScoperAdminLib::delete_user_from_groups($user_id);
         }
         ScoperAdminLib::flush_user_cache($user_id);
     }
 }