请教一个php新手才可能遇到的问题：使用curl进行post请求结果后面多个1

Question

如题；使用php的curl发送post请求；数据可以拿到，但是在服务端返回的json字符串上多了一个数字1，查代码也没找到是什么时候被添加上的，百度完全找不到这方面的资料，应该只有我这样的新手才会遇到吧；

机密原因请求接口不能发出来，代码如下：

<?php
$url = "域名:9789/接口";
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url); 
  curl_setopt($ch, CURLOPT_POST,1); 
  curl_setopt($ch, CURLOPT_POSTFIELDS, "goodsId=56");
  $rt = curl_exec($ch);
  curl_close($ch);
  echo $rt;

页面输出：

{"model":{"id":1},"onTop":2,"soldCount":0,"result":0,"timeMillis":1492765168804}1

Answer 1

Add this
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

Search for the specific meaning by yourself

Answer 2

This 1 should be returned by your interface. You should look at where your 9789 interface is.

Answer 3

$rt == 1