I'm new to cookies, and im trying to set a cookie where to store the referrer (the org ref).
But when i try this function:

function do_it_cookie() {

// Check if cookie exists
if (isset($_COOKIE['ref'])) {

    // It dose exist, do nothing or anything... 

    } else {
        setcookie ('ref', $_SERVER['HTTP_REFERER'], time() + 60, '/');
        header ("Location: http://www.nyttforetag.com/mind-your-own-business/");
    }
}

I want to store the cookie on the user computer for 30 days, if the return i want to know the initial refereeing url.

But when i use this and lets say i go to another page in my site and then go back to the homepage its sets a new cookie with the exact same name and with the ref of the previous page.

Is there away to avoid this?