Drop-Down Directory...Sub directory..File s

[lander06]

I have a directory structure that is constantly being updated.

Config (Root)
--City (Sub-Dir)
----Address (Sub-Dir)
------File

I'm trying to create a script that will:

1. Scan a directory (will be a root dir) and place the directory names in a drop down box.

2. Choose option (dir) and a 2nd box will appear with subdirectores

3. Once you select an option, a 3rd will be presented

4. This directory will have 1 file that needs to be downloaded

 
<?php
 
$dir = "D9034-Configs";
if (isset($_GET['Site'])) { $Site = $_GET['Site']; } else { $Site = $_POST['Site']; }
if (isset($_GET['IP_Address'])) { $IP_Address = $_GET['IP_Address']; } else { $IP_Address = $_POST['IP_Address']; }
 
if (!(isset($Site)))
{
?>
<form id="form1" name="form1" method="post" action="<?php echo $_SERVER['PHP_SELF']?>">
  <select name="Site" id="Site">
<?php
  $output = shell_exec('ls ./'.$dir.'/');
  $dirs = explode("\n", $output);
  foreach ($dirs as $key => $value)
  {
?>    <option value="<?php echo $value?>"><?php echo $value?></option><?php
  }
?>
  </select>
</form>
<?php
}
 
if (isset($Site))
{
?>
<form id="form1" name="form1" method="post" action="<?php echo $_SERVER['PHP_SELF']?>">
  <select name="Site" id="Site">
<?php
  $output = shell_exec('ls ./'.$dir.'/');
  $dirs = explode("\n", $output);
  foreach ($dirs as $key => $value)
  {
    if ($value == $Site)
    {
?>    <option value="<?php echo $value?>" SELECTED><?php echo $value?></option><?php
    }
    else
    {
?>    <option value="<?php echo $value?>"><?php echo $value?></option><?php
    }
  }
?>
  </select>
  <select name="IP_Address" id="IP_Address">
<?php
  $output = shell_exec('ls ./'.$dir.'/'.$Site.'/');
  $dirs = explode("\n", $output);
  foreach ($dirs as $key => $value)
  {
?>    <option value="<?php echo $value?>"><?php echo $value?></option><?php
  }
?>
  </select>
</form>
<?php
}
 
?>