parse an XML with SimpleXML which has multiple namespaces [duplicate]

I think you need to register the namespacing and access with XPath. Something like the following should get you going (I haven't the facility to test this).

$xml = simplexml_load_string($res, NULL, NULL, "http://schemas.xmlsoap.org/soap/envelope/");
$xml->registerXPathNamespace('soap-env', 'http://schemas.xmlsoap.org/soap/envelope/');
$xml->registerXPathNamespace('eb', 'http://www.ebxml.org/namespaces/messageHeader');
$xml->registerXPathNamespace('wsse', 'http://schemas.xmlsoap.org/ws/2002/12/secext');

Then you can do something like:

foreach($xml->xpath('//eb:MessageHeader') as $header)
{
    var_export($header->xpath('//eb:CPAId')); // Should output 'something'.
}

You may not need to register the namespacing, thinking about it, as they are alredy present in the XML. Not sure on this though, would need to test.

Hope this helps.

1) Do not use print_r and friends to see what is "in" a SimpleXML object. See https://github.com/IMSoP/simplexml_debug for explanation and alternatives.

2) Namespace support in SimpleXML is provided by the ->children() and ->attributes() methods.

For example you could get the PartyId of the From node like this:

$from_party = (string)$xml->children('soap-env', true)->Header->children('eb', true)->MessageHeader->From->PartyId;