获取快递单号的接口，有的时候能返回值，有的时候返回不出值
appid ：wxae2f44315b70f177
 $orderUrl="https://api.weixin.qq.com/cgi-bin/express/business/order/add?access_token=".$access_token;
$order=M('order')->where('id='.$order_id)->field('uid,order_sn,address_xq,product_num,name,tel,receiver,photo_x')->find();
$user=M('user')->where('id='.$order['uid'])->field('openid')->find();
$postdata['add_source']=0;
$postdata['order_id']=$order['order_sn'];
$postdata['openid']=$user['openid'];
$postdata['delivery_id']='YUNDA';
$postdata['biz_id']='11111';
//发件人
$postdata['sender']['name']=$j_name;
$postdata['sender']['mobile']=$j_tel;
$postdata['sender']['province']='辽宁省';
$postdata['sender']['city']='盘锦市';
$postdata['sender']['area']='111';
$postdata['sender']['address']='111';
//收件人
$address_arr= explode(" ",$order['address_xq']);
$postdata['receiver']['name']=$order['receiver'];
$postdata['receiver']['mobile']=$order['tel'];
$postdata['receiver']['province']=$address_arr[0];
$postdata['receiver']['city']=$address_arr[1];
$postdata['receiver']['area']=$address_arr[2];
$postdata['receiver']['address']=$address_arr[3];
// 包裹信息，将传递给快递公司
$postdata['cargo']['count']=$order['product_num'];
$postdata['cargo']['weight']='10';
$postdata['cargo']['space_x']='50';
$postdata['cargo']['space_y']='50';
$postdata['cargo']['space_z']='50';
$postdata['cargo']['detail_list']['name']=$order['name'];
$postdata['cargo']['detail_list']['count']=$order['product_num'];
//商品信息，会展示到物流服务通知和电子面单中
$photo=__DATAURL__.$order['photo_x'];
$postdata['shop']['wxa_path']=$wx_url;
$postdata['shop']['img_url']=$photo;
$postdata['shop']['goods_name']=$order['name'];
$postdata['shop']['goods_count']=$order['product_num'];
//保价信息
$postdata['insured']['use_insured']='0';
$postdata['insured']['insured_value']='0';
//服务类型
$postdata['service']['service_type']='0'; //服务类型ID
$postdata['service']['service_name']='标准快件'; //服务名称
$postdatas=json_encode($postdata,JSON_UNESCAPED_UNICODE);
$success=$this->Post_M($orderUrl,$postdatas);
$success = json_decode($success,true);
    return $success;
返回的值：array(2) { ["errcode"]=> int(48001) ["errmsg"]=> string(44) "api unauthorized hints: [xDECIOLoRa-7RtlwA!]" }
操作时间：2020/6/10 8:49