protected function convertToString($data) { $domDocument = $this->getDomDocument(); $result = @$domDocument->loadXML($data); if (true === $result) { if (0 < count($this->getXPathRules())) { $domDocument = $this->sanitizeXML($domDocument); } $formattedXML = @$domDocument->saveXML() . "\n"; return $formattedXML; } else { return parent::convertToString($data); } }