/src/Faker/Provider/Uuid.php
PHP | 48 lines | 30 code | 8 blank | 10 comment | 2 complexity | 20666edb4aaed082c7df679dec649a69 MD5 | raw file
- <?php
- namespace Faker\Provider;
- class Uuid extends \Faker\Provider\Base
- {
- /**
- * Generate name based md5 UUID (version 3).
- * @example '7e57d004-2b97-0e7a-b45f-5387367791cd'
- */
- public static function uuid()
- {
- // fix for compatibility with 32bit architecture; seed range restricted to 62bit
- $seed = mt_rand(0, 2147483647) . '#' . mt_rand(0, 2147483647);
- // Hash the seed and convert to a byte array
- $val = md5($seed, true);
- $byte = array_values(unpack('C16', $val));
- // extract fields from byte array
- $tLo = ($byte[0] << 24) | ($byte[1] << 16) | ($byte[2] << 8) | $byte[3];
- $tMi = ($byte[4] << 8) | $byte[5];
- $tHi = ($byte[6] << 8) | $byte[7];
- $csLo = $byte[9];
- $csHi = $byte[8] & 0x3f | (1 << 7);
- // correct byte order for big edian architecture
- if (pack('L', 0x6162797A) == pack('N', 0x6162797A)) {
- $tLo = (($tLo & 0x000000ff) << 24) | (($tLo & 0x0000ff00) << 8)
- | (($tLo & 0x00ff0000) >> 8) | (($tLo & 0xff000000) >> 24);
- $tMi = (($tMi & 0x00ff) << 8) | (($tMi & 0xff00) >> 8);
- $tHi = (($tHi & 0x00ff) << 8) | (($tHi & 0xff00) >> 8);
- }
- // apply version number
- $tHi &= 0x0fff;
- $tHi |= (3 << 12);
- // cast to string
- $uuid = sprintf(
- '%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x',
- $tLo, $tMi, $tHi, $csHi, $csLo,
- $byte[10], $byte[11], $byte[12], $byte[13], $byte[14], $byte[15]
- );
- return $uuid;
- }
- }