How to use php to access mysql tables and form XML documents

How to use php to access mysql tables and form XML documents? If you want to use php + mysql + dtree + xml to make a dynamic tree directory, do you know how to use php to submit table data and import xml documents? Which of the following heroes can achieve this? If there is a better way to implement the directory tree, such as the directory tree structure in CSDN, it would be better ., Should the problem be: php generates xml, please give the dtree requirements, how to use php to access the mysql table and form an XML document?
If you want to use php + mysql + dtree + xml to make a dynamic tree directory, do you know how to use php to submit table data and import xml documents?
Which of the following heroes can achieve this? If there is a better way to implement the directory tree, such as the directory tree structure in CSDN, it would be better.

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Should the problem be:

Php generates xml
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Please provide the xml format required by dtree
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Nagging, what is your profile picture? I just haven't seen it for a long time !!
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Store all the content to be written into the xml file to a string (the best way is to use "$ str. =)
Use the file_put_contents ('AAA. XML', $ str) function.

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Discussion

Nagging, what is your profile picture? I just haven't seen it for a long time !!