public function site($command) {
		$this->connectIfNeeded();
		$this->param = "SITE " . $command;

		if (!ftp_site($this->handle, $command)) {
			throw new FtpException(
				Yii::t('gftp', 'Could not execute command "{command}" on "{host}"', [
					'host' => $this->host, '{command}' => $this->param
				])
			);
		}
	}