Soaps returns string while object is expected

[christophe]

I'm using the php library found on github. When getting the subscriberBinding the following code is used to parse the response:

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return $this->__generateArrayFromSOAPResult($soapResult->paramNames->x, $soapResult->paramValues->x);

However, the response I receive from the soap call is a string which looks like this:

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string(26) "4;W;0;Opt-Out unsubscribed"

Is it supposed to return a string and is the PHP class on github outdated? or is the response incorrect?