Modyfing XML files through PHP

[mikek12004]

I have xml files of this format

<category>
<name></name>
<title></title>
<href></href>
<descr></descr>
</category>
<category>
<name></name>
<title></title>
<href></href>
<descr></descr>
</category>
......etc

and I want through PHP to be able to:
- modify a certain categories data
- add/delete categories to/from a certain position in the xml
- reorganise the order of the xml
here I have found examples of using SimpleXML to search/update a certain categorie but nothing related to the other two issues in my list above, any advice?

[Dormilich]

- add/delete categories to/from a certain position in the xml

just a matter of the correct addressing (XPath)

- reorganise the order of the xml

not sure if SimpleXML can do that, but certainly DOMDocument should be able to do so.

if everything else fails you still could try XSLT...