PHP if statement if page was loaded using ajax

Question

I have a page that loads with a div populated from the include file (pullList.php), but if you click the button (let them say “reload”), the contents of the div will reload using the same file (pullList.php).

The problem is that when the page loads through ajax (with jquery), I need the include file (function.php) inside the pullList.php file that is already included in the page.

So, ideally, I would like to write an expression that says

if(the page was loaded with ajax) { include(function.php); } 

Thus, the function.php file will be loaded only once, and if the page is requested again via ajax, it has the right functions to display the content correctly.

I tried using include_once but did not work - had the same problem. Any suggestions?

Thanks!

Answer 1

 if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') { include(function.php); } 

Answer 2

 function isAjax() { return (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest')); } 

Source: http://snipplr.com/view/1060/check-for-ajax-request/

Answer 3

Check out $ _SERVER ["HTTP_X_REQUESTED_WITH"] containing xmlhttprequest