Subversion-Projekte lars-tiefland.laravel_shop

<?php

namespace Faker\Provider;

class Uuid extends Base

{

    /**

     * Generate name based md5 UUID (version 3).

     *

     * @example '7e57d004-2b97-0e7a-b45f-5387367791cd'

     *

     * @return string

     */

    public static function uuid()

    {

        // fix for compatibility with 32bit architecture; each mt_rand call is restricted to 32bit

        // two such calls will cause 64bits of randomness regardless of architecture

        $seed = self::numberBetween(0, 2147483647) . '#' . self::numberBetween(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

        return 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],

        );

    }

}