you can use php sessions... example;
<?php
session_start();
if (!session_is_registered('count')) {
session_register('count');
$count = 1;
} else {
$count++;
}
?>
<?
if ($_SESSION['count']>="3") {
?>you have reached you download limit...etc...
<? } else { ?>download code here<? } ?>
hope this helps ;)
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