/**
* @return string
*
* @throws CurlException
*/
public function execute()
{
// This must always be set.
$this->setOption(CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($this->curl);
if ($result === false) {
throw CurlException::error(curl_error($this->curl));
}
return $result;
}