public function toXMLString() { $str = ''; $str .= '<ns:DoUATPAuthorizationReq>'; if ($this->DoUATPAuthorizationRequest != null) { $str .= '<ns:DoUATPAuthorizationRequest>'; $str .= $this->DoUATPAuthorizationRequest->toXMLString(); $str .= '</ns:DoUATPAuthorizationRequest>'; } $str .= '</ns:DoUATPAuthorizationReq>'; return $str; }