Is there a reliable way to find out if a request is in an Ajax context in PHP?

Question

I need to deal with these two cases differently, is there a good solution?

Answer 1

if ($_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest') { /* ajax request */ }

Answer 2

I can think of 2 ways to achieve this:

• On the AJAX side, you can set your own HTTP header with XMLHttpRequest.setRequestHeader(), and then check for this header on the PHP side with getallheaders(), to indicate that the request was made by the AJAX client. If your php script does not find a custom header, you can consider it a non-AJAX request.

• , querystring, . . http://example.com/process?ajax=true AJAX http://example.com/process?ajax=false AJAX.