react.js 使用 axios 将数据发布到 php,但 php echo 为空

2022-01-01 00:00:00 axios reactjs php javascript ajax

我正在使用 react.js、axios 和 PHP 将数据发布到 MySQL 数据库

I am using react.js, axios, and PHP to post data to MySQL database

这是我的 react.js 代码

This is my react.js code

sendData(){
var data = new FormData();
data.append('name', 'jessie');
data.append('time', '12:00');
data.append('food', 'milk');
data.append('nutrition', 'vitaminA');
axios.post(
'./sendData.php',{
  data: data

})
.then(response => {
console.log(response)
console.log(response.data)
this.filter = response.data
})
.catch(e => {
this.errors.push(e)
})
}

这是我的 PHP 代码

And this is my PHP code

<?php
$servername = "127.0.0.1";
$username = "root";
$password = "";
$database = "mydb";


$conn = new mysqli($servername, $username, $password, $database);


if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully yayaya";
echo "the post after this";
echo json_encode($_POST);

?>

这是我的 Chrome 控制台

And this is my Chrome Console

Connected successfully yayayathe post after this[]

我不知道为什么我的 PHP 得到空数据并回显空值.

I don't know why my PHP get empty data and echo empty value.

推荐答案

根据 axios 文档

默认情况下,axios 将 JavaScript 对象序列化为 JSON.

By default, axios serializes JavaScript objects to JSON.

一种选择是从 PHP 代码的正文中读取 json:

$entityBody = file_get_contents('php://input');

那么就不用在FormData中包裹你的数据了,直接添加即可:

Then there's no need to wrap your data in FormData, you can just add it directly:

axios.post(
'./sendData.php',{
  data: {
    name: 'jessie',
    time: '12:00',
    food: 'milk',
    nutrition: 'vitaminA'
  }
})

<小时>

另一个选项是在 axios 中设置 Content-type 头:

axios.post(
  './sendData.php',{
  data: data
  {
    headers: {
      'Content-type': 'multipart/form-data'
    }
  }
})

<小时>

虽然我觉得选项 1 更好


Option 1 seems better to me though

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