如何使用 PHP 检查请求是否是 AJAX 请求 [英] How to check if the request is an AJAX request with PHP

问题描述

我想检查服务器端对我的 php 页面的请求是否是 ajax 请求.

I would like to check server-side if a request to my php page is an ajax request or not.

我看到了两种方法:

第一种方式:在请求中发送一个 GET 参数，告诉页面这是一个 AJAX 请求 (=mypage.php?ajax)

First way: sending a GET parameter in the request which tells the page that this is an AJAX request (=mypage.php?ajax)

mypage.php:

mypage.php:

if(isset($_GET['ajax'])) {
    //this is an ajax request, process data here.
}

第二种方式:给xmlHttpRequest设置一个header:

Second way: set a header to the xmlHttpRequest:

客户端js:

xmlHttpRequestObject.open("GET",url,true);
xmlHttpRequestObject.setRequestHeader('X-Requested-With', 'XMLHttpRequest');

mypage.php:

mypage.php:

if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest' ) {
    //request is ajax
}

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事实上，这两种方式很容易被黑客入侵，所以检查我是否收到这样的 AJAX 请求是不安全的.

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The fact is, those two ways of doing it can easily be hacked, so it's not secure to check if i get an AJAX request like this.

如何检查我是否收到了 AJAX 请求?

How can i check if i'm receiving an AJAX request?

推荐答案

没有确定的方法可以知道请求是通过 Ajax 发出的.您永远不能相信来自客户端的数据.您可以使用多种不同的方法，但可以通过欺骗轻松克服它们.

There is no sure-fire way of knowing that a request was made via Ajax. You can never trust data coming from the client. You could use a couple of different methods but they can be easily overcome by spoofing.

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