vendor/webpatser/laravel-uuid/src/Webpatser/Uuid/Uuid.php

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<?php

namespace Webpatser\Uuid;

use Exception;

/**
 * Class Uuid
 * @package Webpatser\Uuid
 *
 * @property string $bytes
 * @property string $hex
 * @property string $node
 * @property string $string
 * @property string $time
 * @property string $urn
 * @property string $variant
 * @property string $version
 *
 */
class Uuid
{
    const MD5 = 3;
    const SHA1 = 5;
    /**
     * 00001111  Clears all bits of version byte with AND
     * @var int
     */
    const CLEAR_VER = 15;

    /**
     * 00111111  Clears all relevant bits of variant byte with AND
     * @var int
     */
    const CLEAR_VAR = 63;

    /**
     * 11100000  Variant reserved for future use
     * @var int
     */
    const VAR_RES = 224;

    /**
     * 11000000  Microsoft GUID variant
     * @var int
     */
    const VAR_MS = 192;

    /**
     * 10000000  The RFC 4122 variant (this variant)
     * @var int
     */
    const VAR_RFC = 128;

    /**
     * 00000000  The NCS compatibility variant
     * @var int
     */
    const VAR_NCS = 0;