it would be nice of the dir class is extended with a 'sort' method.

The 'sort' method accepts a single flag, indicating the mode by which it needs to sort.

eg:

$dir->sort('name')  : sort A-Za-z, based on names
$dir->sort('ext')   : sort A-Za-z, based on ext
$dir->sort('date')  : sort based on timestamp
$dir->sort('cdate') : sort based on creation date
$dir->sort('adate') : sort based on access date
$dir->sort('size')  : sort based on file size

preceding any call with '-' makes the order descending
+ or nothing defaults to ascending.