php post到C#的接口文件上面，为什么穿过去的是空？

这是对方的接收的代码
我的post代码是这样的
  function request_post($url = '', $param = '') {
        if (empty($url) || empty($param)) {
            return false;
        }
        
        $postUrl = $url;
        $curlPost = $param;
        $ch = curl_init();//初始化curl
        curl_setopt($ch, CURLOPT_URL,$postUrl);//抓取指定网页
        curl_setopt($ch, CURLOPT_HEADER, 0);//设置header
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
        curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
        $data = curl_exec($ch);//运行curl
        curl_close($ch);
        
        return $data;
    }        $o = "";
        foreach ( $post_data as $k => $v ) 
        { 
            $o.= "$k=" . urlencode( $v ). "&" ;
        }
        $post_data = substr($o,0,-1);
     $url = 'http://121.41.122.74:9111/OrderHandler.ashx?context='.$post_data;
        $res = request_post($url, $post_data);       
        print_r($res);

解决方案 »

  1.   

    $post_data['context']   = '<?xml version="1.0" encoding="utf-8" ?>
    <root>
      <head>
        <func_code>110001</func_code>          功能编码
        <deal_time>20160509173045</deal_time>   当前交易时间
      </head>
      <body>
        <BillNum>TEST0001A09XXXYYY</BillNum>
        <Date>2016-05-09</Date>
        <ConsignorNumber>P15051500001</ConsignorNumber>
        <ConsignorContact>张三</ConsignorContact>
        <ConsignorMobile>18892718191</ConsignorMobile>
        <ConsignorPhone></ConsignorPhone>
        <ConsignorAddress>长沙</ConsignorAddress>
        <Consignee>李四</Consignee>
        <ConsigneeContact>李四</ConsigneeContact>
        <ConsigneeMobile>18892718199</ConsigneeMobile>
        <ConsigneePhone>073189210101</ConsigneePhone>
        <ConsigneeAddress>北京</ConsigneeAddress>
        <Delivery>送货</Delivery>
        <CollectMoney>2000</CollectMoney>
        <Worth>1000</Worth>
        <PayMode>现付</PayMode>
        <Note>电商订单TEST</Note>
        <Prods>
          <Prod>
            <Type>瓷砖</Type>
            <Model>普通</Model>
            <ProName>普通</ProName>
            <Qty>1</Qty>
            <Volume>2</Volume>
            <Weight>3</Weight>
          </Prod>
        </Prods>
        <Sign></Sign>
      </body>
    </root>';