public function wiki($keyword)
    {
        if (!empty($keyword)) {
            $ch = curl_init(sprintf($this->_wikiApiUrl, $keyword));
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            $result = curl_exec($ch);
            $error = curl_errno($ch);
            curl_close($ch);

            // $xml = simplexml_load_string($result);
            // if ((string)$xml->Section->Item->Description) {
            //     return array(
            //         (string)$xml->Section->Item->Text,
            //         (string)$xml->Section->Item->Description,
            //         (string)$xml->Section->Item->Url
            //     );
            echo $result;
            if ($result)
            {
                $json = json_decode($result);
                if ($json->description) {
                    return array($json->Text, $json->Description, $json->Url);
                }
            }
            else {
               echo $error;
            }
            return false;
        }
        return false;
    }