php获取某个目录大小的代码

function countDirSize($dir)
{
$handle = opendir($dir);
while (false!==($FolderOrFile = readdir($handle)))
{
if($FolderOrFile != "." && $FolderOrFile != "..")
{
if(is_dir("$dir/$FolderOrFile")) {
$sizeResult += getDirSize("$dir/$FolderOrFile");
} else {
$sizeResult += filesize("$dir/$FolderOrFile");
}
}
}
closedir($handle);
return $sizeResult;
}

function get_real_size($size) {

$kb = 1024; // Kilobyte
$mb = 1024 * $kb; // Megabyte
$gb = 1024 * $mb; // Gigabyte
$tb = 1024 * $gb; // Terabyte

if($size < $kb) {
return $size." B";
}else if($size < $mb) {
return round($size/$kb,2)." KB";
}else if($size < $gb) {
return round($size/$mb,2)." MB";
}else if($size < $tb) {
return round($size/$gb,2)." GB";
}else {
return round($size/$tb,2)." TB";
}
}

$size_zip=countDirSize("../zip/");
$size_zip=get_real_size($size_zip);

<?
/**
* File: fetch user directory use size
* Author: heiyeluren <heiyeluren_AT_gmail_com>
* Create: 2005-9-19 16:20
* Modifed: 2005-9-19 16:41
*/

/*** 基本函数 ***/

//计算目录大小
function countDirSize(dir)
{
handle = opendir(dir);
while (false!==(FolderOrFile = readdir(handle)))
{
if(FolderOrFile != "." && FolderOrFile != "..")
{
if(is_dir("dir/FolderOrFile")) {
sizeResult += getDirSize("dir/FolderOrFile");
} else {
sizeResult += filesize("dir/FolderOrFile");
}
}
}
closedir(handle);
return sizeResult;
}

//保存用户文件大小
function saveDirSize(userDir)
{
userDirSize = countDirSize(userDir);
if (!fp = fopen(userDir."/dir_size.txt", "w+")) {
die("Open file failed");
} else {
fwrite(fp, dirSize);
}
}

//获取用户目录的大小
function getDirSize(userDir)
{
user = addslashes(userDir);
sizeFile = userDir."/dir_size.txt";
if (!fp = fopen(sizeFile, "r") {
return 0;
} else {
dirSize = fread(fp, filesize(sizeFile));
}
return dirSize;
}
/*** 调用实例 ***/
user = "heiyeluren";
userPath = "./user/".user;

//如果用户执行了删除或者上传文件的操作就重新获取目录大小
if (action == "upload" || action == "delete") {
saveDirSize(userPath);
}

userDirSize = getDirSize(userPath)/1024;
echo "用户: ".user;
echo "占用空间: ".userDirSize;
?>