관리-도구

편집 파일: UuidV4.php

<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Uid; /** * A v4 UUID contains a 122-bit random number. * * @author Grégoire Pineau <lyrixx@lyrixx.info> */ class UuidV4 extends Uuid { protected const TYPE = 4; public function __construct(?string $uuid = null) { if (null === $uuid) { // Generate 36 random hex characters (144 bits) // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx $uuid = bin2hex(random_bytes(18)); // Insert dashes to match the UUID format // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx $uuid[8] = $uuid[13] = $uuid[18] = $uuid[23] = '-'; // Set the UUID version to 4 // xxxxxxxx-xxxx-4xxx-xxxx-xxxxxxxxxxxx $uuid[14] = '4'; // Set the UUID variant: the 19th char must be in [8, 9, a, b] // xxxxxxxx-xxxx-4xxx-?xxx-xxxxxxxxxxxx $uuid[19] = ['8', '9', 'a', 'b', '8', '9', 'a', 'b', 'c' => '8', 'd' => '9', 'e' => 'a', 'f' => 'b'][$uuid[19]] ?? $uuid[19]; $this->uid = $uuid; } else { parent::__construct($uuid, true); } } }