XML阅读值s:envelope s:body。

I have a file XML, but I there are two first line strange, with "<s:", I want to read in php the xml data in the "<OrderList>". I have search on google and other about soap, but nothing works. I have tried, simplexml_load_file() and new DomDocument() to parse the data... snif.I have a file XML, but I there are two first li