Parsing XML response in PHP (and/or Zend Framework)

Question

I am using the Zend Framework and using Zend_Http_Client to make a POST request to a third party API.

$client = new Zend_Http_Client('http://api.com');
$client->setParameterPost(array(
    'param1' => 'value'
));
$response = $client->request('POST');
echo $response->getBody();

This API returns an XML document as its response.

<?xml version="1.0" ?>
<registration>
    <id>12345</id>
</registration>

How can I turn the response into something I can work with?

Answer 1

Is it XMLRPC? Look into Zend_XmlRpc. Otherwise: see Pekka's link in the comment on the Question, or use Zend_Config_Xml (not really what its intended for, though)

Answer 2

I find the easiest way is to use SimpleXml

$data = simplexml_load_string($response->getBody());

Then, to get the ID, you can use

$id = (string) $data->registration->id;