Developing a tracking pixel

Question

I am trying to build a pixel that would track the current URL the user is on when they visit. I can use either JS (preferred) or a 1x1 image pixel. With JS I am assuming tha

Answer 1

It is a similar problem with this effect, since a call to a function to execute a mark of when the email was seen or opened was introduced in the alt of the pixel, but it does not throw the action correctly.

public static function visualize()
{

    $wichRemind = Tools::getValue('wichRemind');
    $id_cart = Tools::getValue('id_cart');
    $token = Tools::getValue('token_cart');

    if ($token == md5(_COOKIE_KEY_.'recover_cart_'.$id_cart)) {
        $query = "UPDATE "._DB_PREFIX_."cartabandonment_remind SET visualize = 1 WHERE wich_remind = ".(int)$wichRemind." AND id_cart = ".(int)$id_cart;
        Db::getInstance()->Execute($query);
    }

    header('Content-Type: image/png');
    echo base64_decode('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=');

}