Function to append a parameter to an url querystring

appendParam.php

    /**
     * @param $value
     * @param string $param
     * @return string
     */
    public function appendParam($param, $value)
    {
        $url = $this->request->getUri();
        $queryString = parse_url($url, PHP_URL_QUERY);
        $params = [];
        parse_str($queryString, $params);
        $url = preg_replace('/\?.*/', '', $url);
        $params[$param] = $value;
        return $url . '?' . http_build_query($params);
    }