Parsing Zimbra SOAP response with SimpleXML and xpath

1. <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
2.   <soap:Header>
3.     <context xmlns="urn:zimbra">
4.       <change token="20333"/>
5.     </context>
6.   </soap:Header>
7.   <soap:Body>
8.     <CreateAccountResponse xmlns="urn:zimbraAdmin">
9.       <account id="83ebf344-dc51-47ae-9a36-3eb24281d53e" name="iamtesting@example.com">
10.         <a n="zimbraId">83ebf344-dc51-47ae-9a36-3eb24281d53e</a>
11.         <a n="zimbraMailDeliveryAddress">iamtesting@example.com</a>
12.       </account>
13.     </CreateAccountResponse>
14.   </soap:Body>
15. </soap:Envelope>
16.        
17. $xml = new SimpleXMLElement($data);
18.        
19. $xml->registerXPathNamespace('soap', 'http://www.w3.org/2003/05/soap-envelope');
20.        
21. $body = $xml->xpath('//soap:Body');
22.        
23. $CreateAccountResponse = $xml->xpath('//soap:Body/CreateAccountResponse');
24.        
25. $CreateAccountResponse = $body[0]->CreateAccountResponse;
26.        
27. $zimbraId = $CreateAccountResponse->account->xpath('a[@n=zimbraId]');
28.        
29. $zimbraId = strstr($data, "<a n="zimbraId"");
30. $zimbraId = strstr($zimbraId, ">");
31. $zimbraId = substr($zimbraId, 1, strpos($zimbraId, "<") - 1);
32.        
33. <CreateAccountResponse xmlns="urn:zimbraAdmin">
34.        
35. $xml->registerXPathNamespace('soap', 'http://www.w3.org/2003/05/soap-envelope');
36. $xml->registerXPathNamespace('zimbra', 'urn:zimbraAdmin');
37. $CreateAccountResponse = $xml->xpath('//soap:Body/zimbra:CreateAccountResponse');