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Check for AJAX Request

/ Published in: PHP
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A simple function to check if the request comes from an AJAX XMLHttpRequest.
Use it if your page should behave differently when called from AJAX.
Comes from jquery mailing list: http://jquery.com/discuss/2006-June/006656/

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Copy this code and paste it in your HTML 
  1. function isAjax() {
  2. return (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && 
  3. ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest'));
  4. }

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