define a variable to be set on refresh along with the URL that erases the
cookie by setting it's expire to time() minus a month or so. If you don't
want the url varibale passer to show then have it set the cookie then to a
header redirect to $PHP_SELF.
<?php
if ($refresh) {
setcookie('cookiename', '',(time()-259200000),'/',$HTTP_HOST,0);
}
if ($refresh) {
header("location:" . $PHP_SELF);
exit;
}
?>
use that in the beginning of your page and be sure to add a ?refresh= to
your refreshing url.
hope this helps with what i know about the subject.
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