RE: Problem with Class - incomplete object error

you've included the class definition at the top of every page, right? and why don't you just use $_SESSION["cart"] directly instead of using $cart? that way you don't have to worry about scoping issues and continually passing $cart through to functions. Tim > -----Original Message----- > From: Paul [mailto:pax@cfl.rr.com] > Sent: 18 November 2002 02:59 > To: php-general@lists.php.net > Subject: Problem with Class - incomplete object error > > > Hi All: > > I have a simple page that checks for existence of object in a session. > If the object is not stored in session object, it creates new one: > > If (isset ($_SESSION["cart"])) { > $cart=$_SESSION["cart"]; > } else { > $cart = new ShoppingCart (); > $_SESSION["cart"]= $cart; > } > > So the object cart is available in every page. At this point > the cart is > a simple class: > > class ShoppingCart { > > var $items = array(); > > function AddItem ($item){ > if ($this->items[$item]) { > $this->items[$item]=$this->items[$item]+1; > } else { > $this->items[$item]=1; > } > } // additem > } > > So the cart is either retrieved from the session or created (if non > existent), however, every time the script calls : > $cart->AddItem($_GET['item_id']); > > I get the following error: > Fatal error: The script tried to execute a method or access a property > of an incomplete object. Please ensure that the class definition > shoppingcart of the object you are trying to operate on was loaded > _before_ the session was started in .... on line 59 > > Where line 59 is pointing to $cart->AddItem($_GET['item_id']) > > Session_start is present in every page. > > Could anyone help me understand where the problem is? > > Thanks > Paul > > >