'crc-32' => str_pad(dechex(ord($dir['crc-32'][3])), 2, '0', STR_PAD_LEFT).
                        str_pad(dechex(ord($dir['crc-32'][2])), 2, '0', STR_PAD_LEFT).
                        str_pad(dechex(ord($dir['crc-32'][1])), 2, '0', STR_PAD_LEFT).
                        str_pad(dechex(ord($dir['crc-32'][0])), 2, '0', STR_PAD_LEFT),