[英]Sending data to PHP server with Fetch API (POST method and JSON preferred)
I'm trying Fetch API for the first time and I have problems sending POST
data to a PHP server.我第一次尝试获取 API,但将
POST
数据发送到 PHP 服务器时遇到问题。
I'm moving away from $.ajax
and trying pure javascript solutions to communicate with different servers (sometimes local, sometimes not).我正在远离
$.ajax
并尝试纯 javascript 解决方案与不同的服务器进行通信(有时是本地的,有时不是)。 Now I'm trying to understand Fetch API and, even if it's simple and intuitive, I've stumbled on a weird and unexpected problem:现在我试图理解 Fetch API ,即使它简单直观,我也偶然发现了一个奇怪而意想不到的问题:
I CAN'T send JSON post to PHP server我无法将 JSON 帖子发送到 PHP 服务器
I CAN send form-data post to LOCAL PHP我可以将表单数据发布到本地 PHP
I CAN'T send form-data post to WEB URL PHP我无法将表单数据发送到 WEB URL PHP
I can (obviously) retrieve data from all the above, but strangely nothing arrives.我可以(显然)从上述所有内容中检索数据,但奇怪的是什么都没有到达。 Through
$_SERVER['REQUEST_METHOD']
I can see that when using the LOCAL path I get "POST" as I asked, but when using the WEB URL it changes in GET
for some reason I don't understand.通过
$_SERVER['REQUEST_METHOD']
我可以看到,当使用本地路径时,我得到了“POST”,但当使用 WEB URL 时,由于某种我不明白的原因,它在GET
中发生了变化。
url="/";
url="www.something.com";
fetch(url, {
method: 'POST',
body: JSON.stringify({
test: "toast",
})
})
.then(function(response) {
return response.text();
})
.then(function(data) {
console.log(data);
});
I expect just to send and receive data in a solid and clear way.我希望只是以可靠和清晰的方式发送和接收数据。 No jquery, no libraries, etc. I just want to send a
JSON {"test":"toast"}
and find it on the PHP file when checking the $_POST
var.没有 jquery,没有库等。我只想发送一个
JSON {"test":"toast"}
并在检查$_POST
文件时在 PHP 文件中找到它
It seems that the problem with local and web urls were on this difference: www.something.com/test => www.something.com/test/index.php.似乎本地和 web 网址的问题在于这种差异:www.something.com/test => www.something.com/test/index.php。 Without index.php for some reason it refused the POST data (but read the echoed info anyway).
没有 index.php 出于某种原因它拒绝了 POST 数据(但无论如何都要读取回显信息)。 But the problem about JSON remain.
但是关于 JSON 的问题仍然存在。
I CAN'T send JSON post to PHP我无法将 JSON 帖子发送到 PHP
I CAN send form-data post to PHP我可以将表单数据发送到 PHP
I found that $_POST and $_GET don't work well with Fetch API.我发现 $_POST 和 $_GET 不适用于 Fetch API。 You have to use php://input to get all the data sent to the server.
您必须使用php://input来获取发送到服务器的所有数据。
Don't know why.不知道为什么。 There's a better solution?
有更好的解决方案吗? Why ajax and XMLHttpRequest don't have this kind of problems?
为什么ajax和XMLHttpRequest没有这种问题?
Note: If you want the data to be recognized as json, you have to specify it with a header, even this was never requested so why now?注意:如果您希望数据被识别为 json,您必须使用 header 指定它,即使这从未被请求过,为什么现在? Is Fetch API missing something?
Fetch API 是否缺少某些内容?
header('Content-Type: application/json');
$test=json_decode(file_get_contents("php://input"));
//some code
echo json_encode($test);
There is two ways to use Fetch API: one> Fetch API有两种使用方式:一>
let response = await fetch(url,[Options]);
if (response.ok) { // if HTTP-status is 200-299
// get the response body (the method explained below)
let json = await response.json();
} else {
alert("HTTP-Error: " + response.status);
}
and the second way is to use pure promise syntax:第二种方法是使用纯 promise 语法:
fetch('https://api.github.com/repos/javascript-tutorial/en.javascript.info/commits')
.then(response => response.json())
.then(commits => alert(commits[0].author.login));
now lets talk about options and data: your data must be a JavaScript object like this:现在让我们谈谈选项和数据:您的数据必须是 JavaScript object ,如下所示:
let data = {
test: "toast",
};
then you can config your headers like this:然后你可以像这样配置你的标题:
let headers: {
"Content-Type": "application/json"
}
};
finally use fetch like this:最后像这样使用 fetch :
let response = await fetch(url, {
method: "POST",
headers:headers,
body: JSON.stringify(data)
});
I think your problem is using FormData instead of stringified JavaScript object我认为您的问题是使用 FormData 而不是字符串化 JavaScript object
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