Simplest XML Node Editor for PHP

Could someone please provide the simplest/shortest code that can edit the values within an xml node? I have been searching this for hours and all that I get are errors and failures. I need something that can get the node (/node/node1/node2) and edit the contents within it. I am using php-5. Thanks

Edit: Lets say I have this xml file:

<node>
  <node2>
    Content
  </node2>
</node>

What I need t开发者_运维问答o do is change the value of <node2> from "content" to something else.

SimpleXML

$doc = simplexml_load_file('http://example.com/example.xml');

// Note the SimpleXMLElement is the root node, ie <node>
$doc->node2 = 'new content';

$doc->asXml('new-filename.xml'); // Note, saves locally
// or
$xmlString = $doc->asXml();

You are looking for SimpleXML, great class for XML parsing/editing