Many methods do not return the correct value

[blefort-uo]

In many methods, there is this code used to validate the request:

$xml = simplexml_load_string($response);
write_log($xml->result);
return ($xml->result == 'true'); 

However, I found that the response is different in many situations (I only tested few of them), the response is:

Object(SimpleXMLElement)#225 (2) {
  ["@attributes"]=>
  array(1) {
    ["stat"]=>
    string(2) "ok"
  }
  ["success"]=>
  object(SimpleXMLElement)#221 (0) {
  }
}

so $xml->result == 'true' will never be true.