让PHP承认XML错误。

I am having some grief with an XML feed that I am being sent. I know it is invalid, but the development cycle of the sending program is such that it is not worth waiting for them to be able to correct the error. So I am looking for a work around for it, some way to get PHP to let me read the XML and merge/drop the invalid attribute entries while keeping all the others. I am having some grief with an XML feed that I