Why is this xmlreader code not working?

Question

I have a file that looks like this:

    
       About.com: Animation Guide         


        

Answer 1

Here's an alternate way to get to that attribute:

$string = file_get_contents($filename);
$xml = new SimpleXMLElement($string);
$result = $xml->xpath('/RDF/ExternalPage[*]/@about');
var_dump($result);