<?php
function IsAjax()
{
$isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
if(!$isAjax) {
$user_error = 'Access denied - not an AJAX request...';
trigger_error($user_error, E_USER_ERROR);
}
}
?>
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