recursively locate all unique folders?

[jjk2]

doing the following will repeat folders for each files.

 

<?php
set_time_limit(0);
  $files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator('C:\wamp\www\test'), RecursiveIteratorIterator::CHILD_FIRST);
  foreach($files as $file) {

if ($file->isDir()){

echo $file . "<br>";
}
?>

 

i would like for it to return only unique folders. i dont want it to output the same folders.

 

for example if one of the subfolders have 3 files. it will spit out C:\wamp\www\test\sub\ for each 3 files.

 

i want this script to fetch me recursively unique folder names.