_id; } public function setID($value) { $this->_id=$value; } public function saveToString() { $a=array($this->_id,parent::saveToString()); return serialize($a); } public function loadFromString($data) { if(!empty($data)) { list($id,$str)=unserialize($data); $this->_id=$id; return parent::loadFromString($str); } else return $this; } } ?>