CURL body on error

[rkevinburton@xxxxxxxxxxx]

Currently I have code that looks like:
            $result = curl_exec($this->_ch);
            if( $result === false)
            {
                $info = curl_getinfo($this->_ch);
                $errormsg =  'ModifyPresentationProperty error: ' . 
curl_error($this->_ch);
                throw new \Exception($errormsg);
            }
            $jsonresult = json_decode($result);
The problem that when there is an error the server puts additional error 
information in the body of the response ("odata.error"). How do I access 
the data in the body when there is an error? Right now I only get 
$result which is false in the event of an error and curl_error only 
gives me the error code and a string describing the error code. The 
function curl_info seems to return only information about the request.
This is CURL that comes with PHP 5.5.7. Curl reports version 7.30.0

Thank you.