/** * @param int $num * @return $this * 디지털 암호화 */ function encode_num($num = 0) { $num_len = strlen($num); if (!is_numeric($num) || $num_len > 15) { $this->data = false; $this->message = '숫자를 입력하세요'; return $this; } list($start_rand, $end_rand, $nums, $pies) = [rand(100, 999), rand(10, 99), [], self::unique_rand(1, 9, 9)]; for ($i = 0; $i s..