//webservice得到xsd格式文本
$hu = array("CARDNO" => "123456");
$result = $client->__soapCall('GetCardInfo', array($hu));//print_r 打印  stdClass Object
(
    [GetCardInfoResult] => stdClass Object
        (
            [schema] => <xs:schema xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="NewDataSet">
                <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
                    <xs:complexType><xs:choice minOccurs="0" maxOccurs="unbounded">
                            <xs:element name="ds">
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:element name="CARDID" type="xs:int" minOccurs="0"/>
                                        <xs:element name="FAX" type="xs:string" minOccurs="0"/>
                                        <xs:element name="POSTALCODE" type="xs:string" minOccurs="0"/>
                                        <xs:element name="EMAIL" type="xs:string" minOccurs="0"/>
                                        <xs:element name="PROVINCE" type="xs:string" minOccurs="0"/>
                                    </xs:sequence>
                                </xs:complexType>
                            </xs:element>
                         </xs:choice>
                    </xs:complexType>
                </xs:element>
            </xs:schema>
            [any] => <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
                <NewDataSet xmlns="">
                    <ds diffgr:id="ds1" msdata:rowOrder="0">
                        <CARDID>1344</CARDID>
                        <FAX/>
                        <POSTALCODE>201414</POSTALCODE>
                        <EMAIL/>
                        <PROVINCE>上海市</PROVINCE>
                    </ds>
                </NewDataSet>
            </diffgr:diffgram>
        )
)
我想将页面上 print_r的数据转换成xml文件