PHP5 – parent method call

Ahoj, resim nasledujici problem.. mam tridu class IObject{ private $createdBy; private $note; protected function __construct($createdBy, $note){ $this->$createdBy = $createdBy; $this->$note = $note; } public function store(){ ... } a potomka class CarObject extends IObject{ private $id; private $spz; private $vin; private $manufacturer; private $model; private $madeInYear; private $usingStartedIn; private $weight; private $parentClass; public function __construct($createdBy, $note, $spz, $vin, $manufacturer, $model, $madeInYear, $usingStartedIn, $weight){ parent::__construct($createdBy, $note); $this->$spz = $spz; $this->$vin = $vin; $this->$manufacturer = $manufacturer; $this->$model = $model; $this->$madeInYear = $madeInYear; $this->$usingStartedIn = $usingStartedIn; $this->$weight = $weight; } public function store(){ //super.store(); ... } Ve funkci store ve tride CarObject bych potreboval mimo jine volat metodu store tridy Object. Neco jako java super. Problem je, ze pokud to delam pres parent::store(), nejak uz to nema odkaz na tu instanci predka, kterou vytvarim pod konstruktorem... Asi se nejak v potomkovi musi uchovavat odkaz na instanci predka... ale to je divny.. Diky

Hazi to chybu Cannot access empty property...