public static function clearXml($xml = '', $remEnc = false)
    {
        //$xml = self::clearMsg($xml);
        $aFind = [
            'xmlns:default="http://www.w3.org/2000/09/xmldsig#"',
            ' standalone="no"',
            'default:',
            ':default',
            "\n",
            "\r",
            "\t",
        ];
        if ($remEnc) {
            $aFind[] = '<?xml version="1.0"?>';
            $aFind[] = '<?xml version="1.0" encoding="utf-8"?>';
            $aFind[] = '<?xml version="1.0" encoding="UTF-8"?>';
            $aFind[] = '<?xml version="1.0" encoding="utf-8" standalone="no"?>';
            $aFind[] = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>';
        }
        $retXml = str_replace($aFind, '', $xml);

        return $retXml;
    }