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Name	Size	Permission	Date
Command	[ DIR ]	drwxrwxrwx	2025-03-23 13:35
Factory	[ DIR ]	drwxrwxrwx	2025-03-23 13:35
AbstractUid.php	5.09 KB	-rw-rw-rw-	2024-09-25 04:21
BinaryUtil.php	6.37 KB	-rw-rw-rw-	2024-09-25 04:21
CHANGELOG.md	1.27 KB	-rw-rw-rw-	2024-09-25 04:21
HashableInterface.php	636 B	-rw-rw-rw-	2024-09-25 04:21
LICENSE	1.04 KB	-rw-rw-rw-	2024-09-25 04:21
MaxUlid.php	383 B	-rw-rw-rw-	2024-09-25 04:21
MaxUuid.php	415 B	-rw-rw-rw-	2024-09-25 04:21
NilUlid.php	383 B	-rw-rw-rw-	2024-09-25 04:21
NilUuid.php	472 B	-rw-rw-rw-	2024-09-25 04:21
README.md	604 B	-rw-rw-rw-	2024-09-25 04:21
TimeBasedUidInterface.php	519 B	-rw-rw-rw-	2024-09-25 04:21
Ulid.php	6.88 KB	-rw-rw-rw-	2024-09-25 04:21
Uuid.php	7.36 KB	-rw-rw-rw-	2024-09-25 04:21
UuidV1.php	2.36 KB	-rw-rw-rw-	2024-09-25 04:21
UuidV3.php	592 B	-rw-rw-rw-	2024-09-25 04:21
UuidV4.php	1.33 KB	-rw-rw-rw-	2024-09-25 04:21
UuidV5.php	592 B	-rw-rw-rw-	2024-09-25 04:21
UuidV6.php	3.01 KB	-rw-rw-rw-	2024-09-25 04:21
UuidV7.php	5 KB	-rw-rw-rw-	2024-09-25 04:21
UuidV8.php	573 B	-rw-rw-rw-	2024-09-25 04:21
composer.json	917 B	-rw-rw-rw-	2024-09-25 04:21

Rename

<?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);
        }
    }
}