Parse XML with Namespace using SimpleXML

Question

I have this as xml:


    
        
        Learn QB in Minutes
        9
        
        02/12/2009
        02/12/2009
        11
        30
        
        NOT_INPROGRESS
        
        PUBLIC
    
    ...

How can I loop through all of the event:event nodes and display, for example, all of the event:SessionKey's?

This does not work:

$xml = new SimpleXMLElement($r);
$xml->registerXPathNamespace('e', 'http://www.webex.com/schemas/2002/06/service/event');

foreach($xml->xpath('//e:event') as $event) {
 var_export($event->xpath('//e:sessionKey'));
}

ax_68939 · Answer

it does work without registerXPathNamespace and the full namespace prefix in the xpath queries:

$xml = new SimpleXMLElement($r);

foreach($xml->xpath('//event:event') as $event) {
 var_export($event->xpath('event:sessionKey'));
}

mcrumley_17287 · Answer

You have to register the namespace for each simpleXMLElement object you use.

$xml = new SimpleXMLElement($r);
$xml->registerXPathNamespace('e', 'http://www.webex.com/schemas/2002/06/service/event');

foreach($xml->xpath('//e:event') as $event) {
    $event->registerXPathNamespace('e', 'http://www.webex.com/schemas/2002/06/service/event');
    var_export($event->xpath('//e:sessionKey'));
}

The namespace should also be declared somewhere in the xml file.

...

The method ax described works too. You can skip the registerXPathNamespace if you know the xml file will always use the same prefix.

user_878192 · Answer

Using registerXPathNamespace and then calling xpath didn't actually work for me. I had to go with the solution provided in this great post : http://blog.preinheimer.com/index.php?/archives/172-SimpleXML,-Namespaces-Hair-loss.html

So in your case, this :

echo $xml->children('http://www.webex.com/schemas/2002/06/service/event')->sessionName;

Will output:

Learn QB in Minutes

Parse XML with Namespace using SimpleXML

6 Answers