/**
  * Constructor - if you're not using the class statically
  *
  * @param string $accessKey Access key
  * @param string $secretKey Secret key
  * @param boolean $use_ssl Enable SSL
  * @return void
  */
 public function __construct($accessKey = null, $secretKey = null, $use_ssl = true, $api_host = 's3.amazonaws.com')
 {
     if ($accessKey !== null && $secretKey !== null) {
         self::setAuth($accessKey, $secretKey, $api_host);
     }
     self::$use_ssl = $use_ssl;
     self::$__api_host = $api_host;
 }