code: public function dir_opendir($path, $options = 0)
      {
          if ($this->handle) {
              return false;
          }
          // "use" our function params so things don't complain
          array($options);
          self::restorePrev();
          $this->handle = \opendir($path);
          self::register();
          return $this->handle !== false;
      }
docs: Opens a directory for reading
  
  @param string  $path    Specifies the URL that was passed to opendir().
  @param integer $options Whether or not to enforce safe_mode (0x04).
  
  @return boolean
  
  @see http://php.net/manual/en/streamwrapper.dir-opendir.php