PHP-删除文件夹

 /**
     * 删除缓存目录
     * @param $dirname
     * @return bool
     */
   function delCache($dirname)
    {
        $result = false;
        if (!is_dir($dirname)) {
            echo " $dirname is not a dir!";
            exit(0);
        }
        $handle = opendir($dirname); //打开目录
        while (($file = readdir($handle)) !== false) {
            if ($file != ‘.‘ && $file != ‘..‘) {
                //排除"."和"."
                $dir = $dirname .‘/‘ . $file;
                is_dir($dir) ? delCache($dir) : unlink($dir);
            }
        }
        closedir($handle);
        $result = rmdir($dirname) ? true : false;
        return $result;
    }