PEAR_Downloader::setDownloadDir PHP Method

    function setDownloadDir($dir)
    {
        if (!@is_writable($dir)) {
            if (PEAR::isError(System::mkdir(array('-p', $dir)))) {
                return PEAR::raiseError('download directory "' . $dir . '" is not writeable.  Change download_dir config variable to ' . 'a writeable dir');
            }
        }
        $this->_downloadDir = $dir;
    }