Segment_Client::messageId PHP Method

    private static function messageId()
    {
        return sprintf("%04x%04x-%04x-%04x-%04x-%04x%04x%04x", mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xfff) | 0x4000, mt_rand(0, 0x3fff) | 0x8000, mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff));
    }