function RandomNodeProvider::getNode

Overrides NodeProviderInterface::getNode

File

vendor/ramsey/uuid/src/Provider/Node/RandomNodeProvider.php, line 38

Class

RandomNodeProvider

RandomNodeProvider generates a random node ID

Namespace

Ramsey\Uuid\Provider\Node

Code

public function getNode() : Hexadecimal {
    try {
        $nodeBytes = random_bytes(6);
    } catch (Throwable $exception) {
        throw new RandomSourceException($exception->getMessage(), (int) $exception->getCode(), $exception);
    }
    // Split the node bytes for math on 32-bit systems.
    $nodeMsb = substr($nodeBytes, 0, 3);
    $nodeLsb = substr($nodeBytes, 3);
    // Set the multicast bit; see RFC 4122, section 4.5.
    $nodeMsb = hex2bin(str_pad(dechex(hexdec(bin2hex($nodeMsb)) | 0x10000), 6, '0', STR_PAD_LEFT));
    // Recombine the node bytes.
    $node = $nodeMsb . $nodeLsb;
    return new Hexadecimal(str_pad(bin2hex($node), 12, '0', STR_PAD_LEFT));
}