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Fields.php (5.85 KB)

FieldsInterface.php (4.21 KB)

MaxTrait.php (840 B)

MaxUuid.php (645 B)

NilTrait.php (788 B)

NilUuid.php (644 B)

TimeTrait.php (1.36 KB)

UuidBuilder.php (5 KB)

UuidInterface.php (643 B)

UuidV1.php (1.99 KB)

UuidV2.php (4.21 KB)

UuidV3.php (2.03 KB)

UuidV4.php (1.92 KB)

UuidV5.php (2.03 KB)

UuidV6.php (768 B)

UuidV7.php (1.99 KB)

UuidV8.php (2.24 KB)

Validator.php (1.3 KB)

VariantTrait.php (3 KB)

VersionTrait.php (2.18 KB)

Edit: VariantTrait.php

<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Rfc4122;

use Ramsey\Uuid\Exception\InvalidBytesException;
use Ramsey\Uuid\Uuid;

use function decbin;
use function str_pad;
use function str_starts_with;
use function strlen;
use function substr;
use function unpack;

use const STR_PAD_LEFT;

/**
 * Provides common functionality for handling the variant, as defined by RFC 9562 (formerly RFC 4122)
 *
 * @immutable
 */
trait VariantTrait
{
    /**
     * Returns the bytes that comprise the fields
     */
    abstract public function getBytes(): string;

/**
     * Returns the variant
     *
     * The variant number describes the layout of the UUID. The variant number has the following meaning:
     *
     * - 0 - Reserved for NCS backward compatibility
     * - 2 - The RFC 9562 (formerly RFC 4122) variant
     * - 6 - Reserved, Microsoft Corporation backward compatibility
     * - 7 - Reserved for future definition
     *
     * For RFC 9562 (formerly RFC 4122) variant UUIDs, this value should always be the integer `2`.
     *
     * @link https://www.rfc-editor.org/rfc/rfc9562#section-4.1 RFC 9562, 4.1. Variant Field
     */
    public function getVariant(): int
    {
        if (strlen($this->getBytes()) !== 16) {
            throw new InvalidBytesException('Invalid number of bytes');
        }

// According to RFC 9562, sections {@link https://www.rfc-editor.org/rfc/rfc9562#section-4.1 4.1} and
        // {@link https://www.rfc-editor.org/rfc/rfc9562#section-5.10 5.10}, the Max UUID falls within the range
        // of the future variant.
        if ($this->isMax()) {
            return Uuid::RESERVED_FUTURE;
        }

// According to RFC 9562, sections {@link https://www.rfc-editor.org/rfc/rfc9562#section-4.1 4.1} and
        // {@link https://www.rfc-editor.org/rfc/rfc9562#section-5.9 5.9}, the Nil UUID falls within the range
        // of the Apollo NCS variant.
        if ($this->isNil()) {
            return Uuid::RESERVED_NCS;
        }

/** @var int[] $parts */
        $parts = unpack('n*', $this->getBytes());

// $parts[5] is a 16-bit, unsigned integer containing the variant bits of the UUID. We convert this integer into
        // a string containing a binary representation, padded to 16 characters. We analyze the first three characters
        // (three most-significant bits) to determine the variant.
        $msb = substr(str_pad(decbin($parts[5]), 16, '0', STR_PAD_LEFT), 0, 3);

if ($msb === '111') {
            return Uuid::RESERVED_FUTURE;
        } elseif ($msb === '110') {
            return Uuid::RESERVED_MICROSOFT;
        } elseif (str_starts_with($msb, '10')) {
            return Uuid::RFC_4122;
        }

return Uuid::RESERVED_NCS;
    }
}