You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.3 KiB
43 lines
1.3 KiB
<?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); |
|
} |
|
} |
|
}
|
|
|