php Ajax 是 WordPress 中的
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Is Ajax in WordPress
提问by Racura
Is there anyway to detect if the current server operation is currently an AJAX request in WordPress?
无论如何要检测当前服务器操作当前是否是 WordPress 中的 AJAX 请求？
For example:
例如：
is_ajax()
回答by webaware
Update: since WordPress 4.7.0 you can call a function wp_doing_ajax(). This is preferable because plugins that "do Ajax" differently can filter to turn a "false" into a "true".
更新：从 WordPress 4.7.0 开始，您可以调用函数wp_doing_ajax()。这是更可取的，因为以不同方式“执行 Ajax”的插件可以过滤以将“假”变成“真”。
Original answer:
原答案：
If you're using Ajax as recommended in the codex, then you can test for the DOING_AJAXconstant:
如果您按照 codex 中的建议使用 Ajax ，则可以测试DOING_AJAX常量：
if (defined('DOING_AJAX') && DOING_AJAX) { /* it's an Ajax call */ }
回答by Nate Weller
WordPress 4.7has introduced an easy way to check for AJAX requests, so I thought I would add to this older question.
WordPress 4.7引入了一种简单的方法来检查 AJAX 请求，所以我想我会添加到这个较旧的问题中。
wp_doing_ajax()
From the Developer Reference:
来自开发人员参考：
Description: Determines whether the current request is a WordPress Ajax request.
Return: (bool) True if it's a WordPress Ajax request, false otherwise.
说明：判断当前请求是否为 WordPress Ajax 请求。
返回：(bool) 如果是 WordPress Ajax 请求则为真，否则为假。
It is essentially a wrapper for DOING_AJAX.
它本质上是 DOING_AJAX 的包装器。
回答by Spencer Cameron-Morin
To see if the current request is an AJAXrequest sent from a js library ( like jQuery), you could try something like this:
要查看当前请求是否是从 js 库（如jQuery）发送的AJAX请求，您可以尝试以下操作：
if( ! empty( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) &&
strtolower( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ]) == 'xmlhttprequest' ) {
//This is an ajax request.
}
回答by Ignacio Jose Canó Cabral
I know this is an old thread, but there is an issue with the accepted answer,
我知道这是一个旧线程，但是接受的答案存在问题，
Checking for the defined DOING_AJAX constant will always be true, if the request is to the admin-ajax.php file. (https://core.trac.wordpress.org/browser/tags/4.4.2/src/wp-admin/admin-ajax.php#L16)
如果请求是针对 admin-ajax.php 文件，则检查定义的 DOING_AJAX 常量将始终为真。( https://core.trac.wordpress.org/browser/tags/4.4.2/src/wp-admin/admin-ajax.php#L16)
Sometimes admin-ajax.php hooks aren't used for AJAX request, just a simple endpoint (Paypal IPN for example).
有时 admin-ajax.php 钩子不用于 AJAX 请求，只是一个简单的端点（例如 Paypal IPN）。
The correct way is what Ian and Spencer have mentioned.
正确的方法是 Ian 和 Spencer 提到的。
if( ! empty( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) &&
strtolower( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ]) == 'xmlhttprequest' ) {
//This is an ajax request.
}
(would have commented... but no rep)
（会评论......但没有代表）
回答by Ian Brindley
I am not sure if WordPress has a function for this but it can be done by creating a simple one yourself.
我不确定 WordPress 是否具有此功能，但可以通过自己创建一个简单的功能来完成。
if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest')
{
// Is AJAX request
return true;
}
回答by adamj
if ( ! function_exists('is_ajax') ) {
function is_ajax() {
return defined( 'DOING_AJAX' );
}
}
回答by Kuliraj
I personally prefer the wp_doing_ajax(), but here is another example that should do it.
我个人更喜欢wp_doing_ajax()，但这是另一个应该这样做的例子。
if( true === strpos( $_SERVER[ 'REQUEST_URI' ], 'wp-admin/admin-ajax.php' ) ) {
// is doing ajax
}
