How can I parse a xml file like this?

Dear php users, I'll have to parse a xml file like this: <?xml version="1.0" encoding="utf-8"?>. <SOAP-ENV:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance". xmlns:xsd="http://www.w3.org/2001/XMLSchema". xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/". xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">. <SOAP-ENV:Header>. <TransactionID xmlns="http://www.monternet.com/dsmp/schemas/">00110366325534</TransactionID>. </SOAP-ENV:Header>. <SOAP-ENV:Body>. <SyncOrderRelationReq xmlns="http://www.monternet.com/dsmp/schemas/"><Version>1.5.0</Version><MsgType>SyncOrderRelationReq</MsgType><Send_Address><DeviceType>0</DeviceType><DeviceID>0011</DeviceID></Send_Address><Dest_Address><DeviceType>400</DeviceType><DeviceID>0</DeviceID></Dest_Address><FeeUser_ID><UserIDType>2</UserIDType><MSISDN></MSISDN><PseudoCode>00110046548986</PseudoCode></FeeUser_ID><DestUser_ID><UserIDType>2</UserIDType><MSISDN></MSISDN><PseudoCode>00110046548986</PseudoCode></DestUser_ID><LinkID>SP</LinkID><ActionID>1</ActionID><ActionReasonID>1</ActionReasonID><SPID>819592</SPID><SPServiceID>03010537</SPServiceID><AccessMode>2</AccessMode><FeatureStr>IA==</FeatureStr></SyncOrderRelationReq></SOAP-ENV:Body>. </SOAP-ENV:Envelope> But it seems that xml_parse_into_struct doesn't work well. Any help will be appreciated:) Thanks in advance. Sincerely, Kun