ILLI\System\UUID

<?PHP
    /**
     * ILLI
     *
     * @category   ILLI_System
     * @package    ILLI
     * @link       http://illi.be
     * @license    http://l.illi.be
     * @copyright  ILLI Conference
     */
    NAMESPACE ILLI\System;

    /**
     * ILLI Initial Object
     *
     * @category   ILLI_Boot
     * @package    ILLI
     * @subpackage Boot
     * @namespace  ILLI\Boot
     * @link       http://illi.be
     * @license    http://l.illi.be
     * @copyright  ILLI Conference
     * @since      2.0.1
     * @version    3.0.1
     */
    CLASS UUID EXTENDS Object
    {
        /**
         * @const int 00001111
         */
        const UUID_VERSION_CLEAR    = 15;

        /**
         * @const int 01000000
         */
        const UUID_VERSION_4        = 64;

        /**
         * @const int 00111111
         */
        const UUID_VARIANT_CLEAR    = 63;

        /**
         * @const int 10000000
         */
        const UUID_VARIANT_RFC      = 128;

        /**
         * result
         */
        private $__value        = '';


        public function __construct()
        {
            parent::__construct();

            $uuid = (string) new Rand(16);
            $uuid[6] = chr(ord($uuid[6]) & static::UUID_VERSION_CLEAR | static::UUID_VERSION_4);
            $uuid[8] = chr(ord($uuid[8]) & static::UUID_VARIANT_CLEAR | static::UUID_VARIANT_RFC);

            $this->__value = implode('-', array(
                bin2hex(substr($uuid, 0, 4)),
                bin2hex(substr($uuid, 4, 2)),
                bin2hex(substr($uuid, 6, 2)),
                bin2hex(substr($uuid, 8, 2)),
                bin2hex(substr($uuid, 10, 6))
            ));
        }

        public function __tostring()
        {
            return $this->__value;
        }
    }