Sam Yong

/************************************

 Recursive directory size calculation function
 http://thephpcode.blogspot.com/

 Author: Sam Yong
 blog: http://thephpdeveloper.blogspot.com/

 No illegal use of this script is allowed.

************************************/

function dirsize($dirname) {
if (!is_dir($dirname) || !is_readable($dirname)) {
// check whether the directory is valid.
return false;
}

$dirname_stack[] = $dirname;
$size = 0;

do {
$dirname = array_shift($dirname_stack);
$handle = opendir($dirname);
while (false !== ($file = readdir($handle))) {
if ($file != '.' && $file != '..' && is_readable($dirname . DIRECTORY_SEPARATOR . $file)) {
if (is_dir($dirname . DIRECTORY_SEPARATOR . $file)) {
$dirname_stack[] = $dirname . DIRECTORY_SEPARATOR . $file;
}
$size += filesize($dirname . DIRECTORY_SEPARATOR . $file);
}
}
closedir($handle);
} while (count($dirname_stack) > 0);

return $size;
}