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Prevent caching in IE ajax response

You must have noticed that IE will show the cached response for the ajax calls.
To prevent this, just add these lines before outputting any content as response:

<?php
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
?>
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