Login /w cookies

Well, I've been developing a member system for my site however I have just struck a block. I would like to store a cookie in the client's browser so the first time he logs on he stays logs on forever until he logs off by clicking the log off button. So if he logged on today & visited a week later, he'd still be logged on.

$name = "username";
$value = "my username";
$date = date("r",strtotime("+90 day"));
$path = "/";

header("Set-Cookie: $name=$value; expires=$date; path=$path;");

this would expire in 90 days store a cookie variable as username and contain the variable my username

its also accessable from any dir under the current one

I've tried the setcookie() function however I still cannot set a cookie...


Any ideas?

Edit: Ignore the <a> tag in the header(). vb is putting the code in by itself...