axios http总是返回空数据 [英] axios http always returns with empty data

问题描述

之前我问过这个问题而无法得到答案。我能够使用方法：'得到'如下，让它工作，所以它没关系，但这次我需要使用post。在一个不同的项目中（使用react，redux，php，webpack，xampp），同样的问题已经重新出现，我正试图弄明白。所以这就是：

I asked this question before and wasn't able to get an answer. I was able to do use method: 'get' like below to get it working so it was okay but this time I need to use post. In a different project (using react, redux, php, webpack, xampp) the same issue has resurfaced and I am trying to figure it out. So here it is:

register.php

  echo $_GET['task'];

index.js

  const values = {task: 'doSomething', username: 'username'}
  axios({
      url: "./server/register.php",
      timeout: 20000,
      method: 'get',
      params: values
  }).then(function(response){console.log(response.data)})

当我执行上述操作时，一切正常，数据记录为'doSomething'。但是，当我尝试使用axios（{method：'POST'}）并将php更改为$ _POST ['task']时，我收到一条错误消息，说$ _POST ['task']未定义如下：

When I do the above everything is okay and the data is logged out as 'doSomething'. However, when I try using axios({method: 'POST'}) and changing the php to $_POST['task'] I get an error saying that $_POST['task'] is undefined like below:

index.js

  axios({
      url: "/projects/myProject/server/register.php",
      method: 'post',
      data: values
  }).then(function(response){console.log(response.data)})

register.php

echo $_POST['task'];

注意：未定义索引：任务

当我尝试使用axios.post（）时，我遇到了完全相同的问题。我想在这里使用帖子请求。任何人都可以为我解释这个问题吗？

Also when I try this using axios.post() I encounter the exact same problem. I want to use a post request here. Can anyone shed some light on this for me?

推荐答案

好了之后，我找到了答案。在PHP之前，必须先添加这一行才能访问任何POST数据：

Okay after a fair amount of scratching my head I have found an answer. On the PHP this line has to be added before I can access any POST data:

$_POST = json_decode(file_get_contents('php://input'), true);
echo $_POST['task'];

根据我的理解，从axios输入的数据是JSON所以我们必须以JSON编码的字符串返回它使用file_get_contents（）然后使用json_decode将其转换为来自JSON编码字符串的php变量。希望这有助于其他人。谢谢。

From my understanding the data being inputted from axios is JSON so we must return it in a JSON encoded string using file_get_contents() and then convert this into a php variable from the JSON encoded string using json_decode. Hope this helps someone else. Thank you.

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