/**
* @brief construct
*/
public function __construct($api_key, $api_secret, $basecamp = false)
{
if ($basecamp) {
self::$coolsms_user = $api_key;
self::$basecamp = true;
} else {
self::$api_key = $api_key;
}
self::$api_secret = $api_secret;
self::$user_agent = $_SERVER['HTTP_USER_AGENT'];
}