unlink(/home/xhrcwqxnh6rtcdw/wwwroot/caches/temp//0255cb9772949f9ead21ea8c72b9ec99.php): Permission denied

} 

//删除根据目录删除子文件
function dir_del($dirpath){
    $dh=opendir($dirpath);
    while (($file=readdir($dh))!==false) {
        if($file!="." && $file!="..") {
            $fullpath=$dirpath."/".$file;
            if(!is_dir($fullpath)) {
                unlink($fullpath);
            } else {
                dir_del($fullpath);
                @rmdir($fullpath);
            }
        }
    }    
    closedir($dh);
    $isEmpty = true;
    $dh=opendir($dirpath);