I have a folder A, it has many sub folders, each of sub folders has some files in it.

I need to find out the size of the folder. one thing i can do is to search all hte file and files in the sub folders, and get totoal size of all files.

but i dont know how many level of the sub folder gonna be.

is there a better way to get it ? thanx for your help.

Check out the PHP Manual on filesize(), chances are the user contributed notes has an example or two on using it to recursively sum the size of all the files and subdirectories in a directory.

if you can use exec() function (or similar)
then use exec('du --si -s '.$directory);

function recursive_filesize($dir)
{
if (!($dh = opendir($dir))) return 0;

$total = 0;
while (($file = readdir($dh)) !== false)
{
if ($file != '.' && $file != '..')
{
$file = $dir . '/' . $file;
if (is_dir($file) && is_readable($file) && !is_link($file))
$total += recursive_filesize($file);
else
$total += filesize($file);
}
}
closedir($dh);
return $total;
}


Total size in bytes.

Total size in kb:

<?php
echo number_format((recursive_filesize(getcwd())/1024));
?>