Anonymous

<form method="get">
  <input name="dir" type="text" />
  <input type="submit" />
</form>
<?php
  if ($_GET['dir'] == '')
    die;

  $dirlist = scandir($_GET['dir']);
  
  foreach ($dirlist as $item)
    echo '<a href="' . $_GET['dir'] . '/' . $item . '">' . $item . "</a><br />\n";
?>