PHP How to convert XML string to XML, to master the detailed

How PHP converts XML strings to XML for expert explanation
I used file_get_contents () to get an XML string, how to convert to XML, read a lot of articles, are used simplexml_load_string (); What to do next?

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Http://topic.csdn.net/u/20120229/17/2d8adf3f-5273-4330-a399-b67b5e395e3d.html
The #17 content and related content of this post.
The specific is:
1. Compile the array into XML string Dump_xml_config ();
2. Write XML string to file File_put_contents_safe ();
3, http://topic.csdn.net/u/20120228/09/cf787cd0-5936-4a15-9661-895f362b5b16.html
#10, convert the contents of the XML file to an array of parse_xml_config ().
You can take what you need.
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Simplexml_load_string (); then the DOM of the XML. What to do next, ask what you are going to do next.
Operation of SimpleXML:
Http://www.w3school.com.cn/php/php_ref_simplexml.asp

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