xml_and _php

[dmf9000]

I want ask how can I write
in a existing XML file,with php.
ex:add nodes,set atributes,modify etc.

For example: How can I modify the information of a file containing the following information:

<PEOPLE>
<INFORMATION>
<NAME>DUARTE</NAME>
<AGE>24</AGE>
</INFORMATION>
</PEOPLE>

ex: In the tag <Name> I want modify the data "Duarte" to "john".

Thank you in advanced.

[mcfbn]

use the PHP DOM-XML functions:
http://www.php.net/manual/en/ref.domxml.php