使用setcookie（）导致序列化和反序列化不能在PHP中工作

I am trying to pass an array between 2 pages for a website, I am using setcookie() and serialize() to do so. It seems to be coded correctly, but is not working

First File:

setcookie('iconHumans', serialize($iconHumans));
setcookie('iconRatings', serialize($iconRatings));
setcookie('iconIDs', serialize($iconID), time()+3600);
setcookie('curIcon', 0);

Second File:

    if(isset($_COOKIE['iconIDs'])){
        echo "unserializing: <br>";
        $iconHumans = unserialize($_COOKIE['iconHumans']);
        $iconRatings = unserialize($_COOKIE['iconRatings']);
        $iconIDs = unserialize($_COOKIE['iconIDs']);
        $curIcon = $_COOKIE['curIcon'];
    }

When i use vardump to show the variables:

echo"This should be the Ratings: <br>";
var_dump($iconRatings);

Null is returned for all 3 even thought before serialization the arrays were intact

but, for curIcon 0 is printed out properly

Any explanation why this isn't working would be very helpful I also tried Json_encode/decode and that did not work either

I am using firefox

Thanks in advance