Directory listing in PHP

[edit] i write a new function: PHP directory listing : convert a folder tree into an array [/edit]

Hello world!

Lately im working on a series of tools which can be useful to organize works in web. Of course, nothing new, but im developing somthing mine and small that i can overwork instead of more complex tools.

This run for web of course and my interest is about:

• deploy
• backup
• maintenance

Well about deploy i actually don't know what i want.
Backup it's what im working at.
maintenance i mean a simple tool that switch web-sites/single page in maintenance or work.

About Backup:
I first thought at a tool for a full and incremental backup, but in the end i decided to add the possibility to manage backup as project, saving status about multiple projects. Im currently working and the first piece of code i will give you is a pair of functions that help you to list directories recursively (and turn it into a PHP array.

function create_tree ($path) {
  if(is_dir($path)) {
  $tree["$path"] = array();
  $tree = get_tree($path, $tree);
  return $tree;
 } else {
  echo "<$path> is not a directory";
  exit;
 }
}

function get_tree($path, $tree) {
 $dir = dir($path);
 while(false !== ($entry = $dir->read())) {
  $complete = "$path/$entry";
  if(is_dir($complete) && $entry != "." && $entry != "..") {
   $tree["$path"]["$entry"] = get_tree($complete, $tree[$path][$entry]);
  } elseif($entry != "." && $entry != "..") {
   $mod = date('d-m-Y H:i:s', filemtime($complete));
   $tree[] = array( "fn" => $entry, "mod" => $mod);
  }
 }
 return $tree;
}

And that is that, as you can see when it adds a new entry into the array it save last modification time too, sure will be useful to incremental backup.

TODO: pretty print!!!!