public function expire($expire = 0)
    {
        $var = null;
        $var = substr($expire, 0, 1);

        if (in_array($var, ['+', '-'])) {
            $this->expire = strtotime($expire);

            if ($this->expire === false) {
                throw new \InvalidCookieException(
                    'Cookie->setExpire was passed a string it could not parse - "'.$expire.'"'
                );
            }

            return $this;
        }

        $this->expire = 0;

        return $this;
    }