Those are there to prevent IE from caching the query, as it will sometimes
do so when you don't want it to.
On Tuesday, December 18, 2012 12:06:09 AM UTC-5, Chrystopher Medina wrote:
>
> hi my friend
>
> i have t put this next lines. or what are exactly saludos thanks a lot for
> helping me ....
>
> header('Cache-Control: no-cache, must-revalidate');
> header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
>
>
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