<?
/* Directory Size - by dark2k1(dark2k1.com) */

$directory = "/some directory/";
if ($handle = opendir("$directory")) {

    while (false !== ($file = readdir($handle))) { 
	$size = filesize("$directory$file");
	$totalsize += $size;
    }

echo "totalsize: $totalsize";
if ($totalsize > 30000) {
echo "You have exceded your maximum storage limit";
} else {
echo "You have not reached your maximm storage limit";
}

    closedir($handle); 
}
?>