php edit xml file

[android6011]

I have an xml file that looks roughly like this:

<?xml version="1.0" encoding="ISO-8859-1" ?>

<videos>

<video url="new.flv" desc="Guitar Solo" />

</videos>

 

what i want to be able to do is add more entries like "<video url="new.flv" desc="Guitar Solo" />". How can I get it to add the entry into the right place, so it doesnt show up after the </videos>?

[per1os]

<?xml version="1.0" encoding="ISO-8859-1" ?>
<videos>
<?php
$arrayEntrys = array("extra.flv" => "Extra", "new.flv" => "Guitar Solog");

foreach ($arrayEntrys as $url => $desc) {
      print '<video url="'.$url.'" desc="'.$desc.'" />
}
?>
</videos>

[android6011]

so how should i use that along with opening the existing .xml file and save it?