php 批量删除文件夹

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//删除文件
function deldir($dir)
{
    //先删除目录下的文件
    $dh = opendir($dir);
    while ($file = readdir($dh)) {
        if ($file != "." && $file != "..") {
            $fullpath = $dir . "/" . $file;
            if (!is_dir($fullpath)) {
                unlink($fullpath);
            } else {
                deldir($fullpath);
            }
        }
    }

    closedir($dh);
//删除当前文件夹;
    if(rmdir($dir)){
        return true;
    }else{
        return false;
    }
}