public static function sendMessageToAll($message) { $query = ""; $users_id = AdminUser::getAllUserId(); for ($i = 0; $i < count($users_id); $i++) { $query .= "INSERT INTO messages (id_user1, id_user2, text, date, id_who_delete) VALUES(-1, '{$users_id[$i]}', '{$message}', NOW(), -1);"; } \Yii::$app->db->createCommand($query)->execute(); }