public static function jsonToList($p_json)
    {
        $str = '';
        $arr = json_decode($p_json, true);
        foreach ($arr as $key => $value) {
            if ($str == '') {
                $str = $str . $key . '=' . $value;
            } else {
                $str = $str . ', ' . $key . '=' . $value;
            }
        }

        return $str;
    }