[RESOLVED] Parsing XML Using SimpleXML - Completely Stuck

[h_a_l_]

Hello,
I am trying to parse date from the alexa.com api, although to simplify things I have currently saved the xml file to my server.

This is my xml, which I have also validated:

<?xml version="1.0"?>
<aws:UrlInfoResponse xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/"><aws:Response xmlns:aws="http://awis.amazonaws.com/doc/2005-07-11"><aws:OperationRequest><aws:RequestId>xxxxxxxxxxxxxxxx</aws:RequestId></aws:OperationRequest><aws:UrlInfoResult><aws:Alexa>

  <aws:TrafficData>
    <aws:DataUrl type="canonical">phpbuilder.com/</aws:DataUrl>
    <aws:Rank>14781</aws:Rank>
  </aws:TrafficData>
</aws:Alexa></aws:UrlInfoResult><aws:ResponseStatus xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/"><aws:StatusCode>Success</aws:StatusCode></aws:ResponseStatus></aws:Response></aws:UrlInfoResponse>

Now my code:

$xml = simplexml_load_file('alexa.xml');

if (file_exists('alexa.xml')) {
	$xml = simplexml_load_file('alexa.xml');
	var_dump($xml); // Gives object(SimpleXMLElement)#2 (0) { }
} else {
exit('Error.');
} 

There is no error, and the xml should be valid... but how do I access the traffic rank which in this case is 14781?

Something like this?
echo $xml->{'aws:TrafficData[0]'}->{'aws:Rank'}; ?
or
echo $xml->{'aws:Response'}->{'aws:TrafficData[0]'}->{'aws:Rank'};

This is driving me crazy, any help much appreciated!

Cheers,

hal

[h_a_l_]

Found a solution!

It appears simplexml does not like the ":aws".

<PHP>
$filecontent = file_get_contents($awis_url); //get data from alexa
$filecontent = str_replace("aws:","",$filecontent); ///strip out the annoying aws tags
$xml = simplexml_load_string($filecontent); //convert to simplexml
$page = $xml->Response->UrlInfoResult->Alexa->TrafficData->Rank;
</PHP>

Solution by Jeff Galak
http://developer.amazonwebservices.com/connect/thread.jspa?threadID=14285&tstart=0