Mysidia Adoptables Support Forum - Error When Using Item

No, I have not touched it., or at least not that I recall. ((I wish PHP made more sense to me XD))
PHP Code:

		
			
<?php



class InventoryController extends AppController{



    const PARAM = "confirm";

    private $view;

    private $subController;



    public function __construct(){

        parent::__construct("member");

    }

    

    public function index(){

        $mysidia = Registry::get("mysidia");

        $document = $mysidia->frame->getDocument();

        $document->setTitle($mysidia->lang->inventory);

        

        $inventory = new Inventory($mysidia->user);

        if($inventory->gettotal() == 0) throw new InvalidIDException($mysidia->lang->inventory_empty);

        $inventory->display();

    }

            

    public function uses(){

        $mysidia = Registry::get("mysidia");

        $document = $mysidia->frame->getDocument();

        $item = new PrivateItem($mysidia->input->post("itemname"), $mysidia->user->username);   

        if($item->iid == 0) throw new InvalidIDException("It appears that you do not have this item in your inventory.");

        

        if($mysidia->input->post("aid")){

            if(!$item->checktarget($mysidia->input->post("aid")) or $mysidia->input->post("validation") != "valid"){

                $document->setTitle($mysidia->lang->use_title);

                $document->addLangvar($mysidia->lang->use_fail);

            }

            elseif(!$item->randomchance()){

                $item->remove();

                $document->setTitle($mysidia->lang->badluck);

                $document->addLangvar($mysidia->lang->effect);

            }

            else $item->apply($mysidia->input->post("aid")); 

            return;            

        }

        

        $document->setTitle($mysidia->lang->select_title);

        $document->addLangvar($mysidia->lang->select);

        

        $chooseFrom = new Form("chooseform", "uses", "post");

        $adoptable = new DropdownList("aid");

        

        $ids = $mysidia->db->select("owned_adoptables", array("aid"), "owner = '{$mysidia->user->username}'")->fetchAll(PDO::FETCH_COLUMN);    

        $names = $mysidia->db->select("owned_adoptables", array("name"), "owner = '{$mysidia->user->username}'")->fetchAll(PDO::FETCH_COLUMN);

        $adoptable->add(new Option("None Selected", "none"));

        $adoptable->fill($names, $ids);

        

        $chooseFrom->add($adoptable);

        $chooseFrom->add(new PasswordField("hidden", "itemname", $mysidia->input->post("itemname")));

        $chooseFrom->add(new PasswordField("hidden", "validation", "valid"));

        $chooseFrom->add(new Button("Choose this Adopt", "submit", "submit"));

        $document->add($chooseFrom);

    }

    

    public function sell(){

        $mysidia = Registry::get("mysidia");

        $document = $mysidia->frame->getDocument();

        $item = new PrivateItem($mysidia->input->post("itemname"), $mysidia->user->username);   

        if($item->iid == 0) throw new InvalidIDException("It appears that you do not have this item in your inventory.");

        

        if(!$mysidia->input->post("quantity")){

            $document->setTitle($mysidia->lang->global_action_title);

            $document->addLangvar($mysidia->lang->sell_empty);

        }

        elseif($item->quantity < $mysidia->input->post("quantity")){

            $document->setTitle($mysidia->lang->global_action_title);

            $document->addLangvar($mysidia->lang->sell_quantity);

        }

        else{

            $item->sell($mysidia->input->post("quantity"));

            $document->setTitle("Transaction Completed");

            $document->addLangvar("{$mysidia->lang->sell}{$mysidia->input->post("quantity")} {$mysidia->input->post("itemname")} {$mysidia->lang->sell2}");

        }    

    }

    

    public function toss(){

        $mysidia = Registry::get("mysidia");

        $document = $mysidia->frame->getDocument();

        $item = new PrivateItem($mysidia->input->post("itemname"), $mysidia->user->username);  

        if($item->iid == 0) throw new InvalidIDException("It appears that you do not have this item in your inventory.");

        

        if($mysidia->input->get("confirm")){

            $item->toss();

            $document->setTitle($mysidia->lang->global_action_complete);

            $document->addLangvar($mysidia->lang->toss.$mysidia->input->post("itemname").$mysidia->lang->toss2);

            return;

        }

        

        $warning = "Are you sure you wish to toss {$mysidia->input->post("itemname")}?<br> 

                    It will be permanently removed from your inventory, and this action cannot be undone!<br>";

        $document->setTitle("Confirm your Action");

        $document->add(new Comment($warning));    



        $confirmForm = new FormBuilder("confirmform", "toss/confirm", "post");

        $confirmForm->buildPasswordField("hidden", "action", "toss")

                    ->buildPasswordField("hidden", "itemname", $mysidia->input->post("itemname"))

                    ->buildButton("Please Toss", "confirm", "confirm");

        $document->add($confirmForm);            

    }

}

?>