PHP get directory size

   function dirsize($dir)
    {
    
        @$dh = opendir($dir);
        $size = 0;
        while ($file = @readdir($dh)) {
    
            if ($file != "." and $file != "..") {
    
                $path = $dir . "/" . $file;
                if (is_dir($path)) {
    
                    $size += dirsize($path);
                } elseif (is_file($path)) {
    
                    $size += filesize($path);
                }
            }
        }
        @closedir($dh);
        return $size;
    }