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