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Posted by lawrence k on 11/18/84 11:44
I noticed this odd PHP function in an article about AJAX and Prototype:
> http://www.sitepoint.com/article/painless-javascript-prototype/2
>
> Prototype adds a custom HTTP header to all its AJAX requests so that your server
> application can detect that it's an AJAX call, rather than a normal call. The header is:
>
> X-Requested-With: XMLHttpRequest
>
> Here's an example PHP function used to detect an AJAX call:
>
> function isAjax() {
> return isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&
> $_SERVER ['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest';
> }
Most of the AJAX calls I've seen are GET or POST, so I expect them to
show up in the $_GET or $_POST arrays. Why would this header show up in
the $_SERVER array?
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