How to check if the request is an AJAX request with PHP -

i check server-side if request php page ajax request or not.

i saw 2 ways this:

first way: sending get parameter in request tells page ajax request (=mypage.php?ajax)

mypage.php:

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

second way: set header xmlhttprequest:

client-side js:

xmlhttprequestobject.open(“get”,url,true); xmlhttprequestobject.setrequestheader('x-requested-with', 'xmlhttprequest'); 

mypage.php:

if (!empty($_server['http_x_requested_with']) && strtolower($_server['http_x_requested_with']) == 'xmlhttprequest' ) {     //request ajax } 

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the fact is, 2 ways of doing can hacked, it's not secure check if ajax request this.

how can check if i'm receiving ajax request?

there no sure-fire way of knowing request made via ajax. can never trust data coming client. use couple of different methods can overcome spoofing.