// should not be public
    public function setName($name, $value)
    {
        $this->{$name} = $value;
        //if (ctype_alnum($name) == true)
        //(die('The name of the store should only contain letters');
        //$this->name = $name;
    }
    public function get($var)
    {
        return $this->{$var};
    }
    public function __get($var)
    {
        echo "This doesn't exist.";
    }
}
class Branch extends Store
{
    protected $branchId;
    public function __construct()
    {
    }
}
$branch = new Branch();
$branch->set("Store", "Doggy store");
$branch->set("branchId", "742368");
echo $branch > get("Store");
echo $branch > get("branchId");
echo $branch > get("eee");
/*output : Doggy store742368This doesn't exist. */