axios http 总是返回空数据

问题描述

我之前问过这个问题，但无法得到答案.我能够像下面那样使用方法:'get'来让它工作所以没关系但是这次我需要使用post.在另一个项目中(使用 react、redux、php、webpack、xampp)，同样的问题又出现了，我正在努力解决这个问题.所以这里是:

register.php

 echo $_GET['task'];

index.js

 const values = {task: 'doSomething', username: 'username'}轴({url: "./server/register.php",超时:20000，方法:'获取'，参数:值}).then(function(response){console.log(response.data)})

当我执行上述操作时，一切正常，数据以doSomething"的形式注销.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，指出 $_POST['task'] 未定义，如下所示:

index.js

 axios({url: "/projects/myProject/server/register.php",方法:'发布'，数据:值}).then(function(response){console.log(response.data)})

register.php

echo $_POST['task'];

<块引用>

注意:未定义索引:任务

此外，当我使用 axios.post() 尝试此操作时，我遇到了完全相同的问题.我想在这里使用 post 请求.任何人都可以为我解释一下吗?

好吧，经过一番摸索，我找到了答案.在 PHP 上，必须先添加这一行，然后才能访问任何 POST 数据:

$_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，因此我们必须使用 file_get_contents() 以 JSON 编码的字符串形式返回它，然后使用 json_decode 将其从 JSON 编码的字符串转换为 php 变量.希望这对其他人有帮助.谢谢你.

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)})

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'];

Notice: Undefined index: task

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?

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'];

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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