呼叫search_express會返回快遞公司的json陣列

 public function search_express($nid){
    $logisticResult = $this->getOrderTracesByJson($nid);
    return json_decode(json_encode($logisticResult));
    }

    /**
     * Json方式 單號識別
     */
   public function getOrderTracesByJson($nid){
        $requestData= "{'LogisticCode':"
 
.$nid."}";
        $datas = array(
            'EBusinessID' => 1265911, //快遞鳥id
            'RequestType' => '2002',
            'RequestData' => urlencode($requestData) ,
            'DataType' => '2',
        );
        $datas['DataSign'] = $this->encrypt($requestData,'ca2ed521-8875-4afb-88f9-566f99c68c6b'
 
);//生成簽名
        $result=$this->sendPost("http://api.kdniao.cc/Ebusiness/EbusinessOrderHandle.aspx", $datas);
        return $result;
    }

    /**
     *  post提交資料
     * @param  string $url 請求Url
     * @param  array $datas 提交的資料
     * @return url響應返回的html
     */
    public function sendPost($url, $datas
 
) {
        $temps = array();
        foreach ($datas as $key => $value) {
            $temps[] = sprintf('%s=%s', $key, $value);
        }
        $post_data = implode('&', $temps);
        $url_info = parse_url($url);
        if(empty($url_info['port']))
        {
            $url_info['port']=80;
        }
        $httpheader = "POST " . $url_info['path'] . " HTTP/1.0\r\n";
        $httpheader.= "Host:" . $url_info['host'] . "\r\n";
        $httpheader.= "Content-Type:application/x-www-form-urlencoded\r\n";
        $httpheader.= "Content-Length:" . strlen($post_data) . "\r\n";
        $httpheader.= "Connection:close\r\n\r\n";
        $httpheader.= $post_data;
        $fd = fsockopen($url_info['host'], $url_info['port']);
        fwrite($fd, $httpheader);
        $gets = "";
        $headerFlag = true;
        while (!feof($fd)) {
            if (($header = @fgets($fd)) && ($header == "\r\n" || $header == "\n")) {
                break;
            }
        }
        while (!feof($fd)) {
            $gets.= fread($fd, 128);
        }
        fclose($fd);

        return $gets;
    }

    /**
     * Sign簽名生成
     * @param data 內容
     * @param appkey Appkey
     * @return DataSign簽名
     */
   public function encrypt($data,$appkey) {
        return urlencode(base64_encode(md5($data.$appkey)));
    }