$name == null) { if(!$this->id) { return null; } if($name == "origin") { $this->origin = new Address($this->origin_address_id); return $this->origin; } $classname = ucfirst($name); $idfield = $name."_id"; $this->$name = new $classname($this->$idfield); if($this->$name->id) { return $this->$name; } else { return null; } } return $this->$name; } }