/**
* Build request string.
*
* @param SMS $SMS
*
* @return string
*/
public function buildRequest(SMS $SMS)
{
$request = $this->getConfig('url');
$request .= 'api_key=' . $this->getConfig('key');
$request .= '&api_secret=' . $this->getConfig('secret');
$request .= '&from=' . $SMS->getSender();
$request .= '&to=' . $SMS->getReceiver();
$request .= '&text=' . urlencode($SMS->getMessage());
return $request;
}