intendevo questa:
codice:
function dirsize($path)
{
  $old_path = getcwd();
  if(!is_dir($old_path."/".$path)) return -1;
  $size = trim(shell_exec("cd \"".$old_path."/".$path."\"; du -sb; cd \"".$old_path."\";"), "\x00..\x2F\x3A..\xFF");

  return $size;
}