Help,

I'm trying to change a cookie to whatever is submitted as a URL
parameter called 'aid.' But once it's set the first time, I can't get
it to overwrite it next time the 'aid' parameter is received. How do I
make this work? Here is my code:

<?php
if ("$aid" != "")
{
setcookie("aid", $aid, time() + 31536000, "/", ".mydomain.com", 0);
}
else
{
$aid = $_COOKIE['aid'];
}
?>


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