<?

$xml = '<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <Email_AddResponse xmlns="http://api.emaildirect.com/v1">
      <Email_AddResult>
        <ResultCode>int</ResultCode>
        <ResultMessage>string</ResultMessage>
      </Email_AddResult>
    </Email_AddResponse>
  </soap12:Body>
</soap12:Envelope>';

$object = simplexml_load_string($xml);


echo "<pre>";
var_dump($object);
print_r($object);
echo "</pre>";