You should start a new discussion for a new question. Also, your question is vague. What does it mean to convert XML to PHP? Those aren't the same kind of files. Do you mean XHTML to PHP? Or do you want to store XML data in a PHP file or database?
I'm going to close this discussion now. Please repost in a new thread including more information. If any specific point in this discussion is relevant, you can link to it.