Showing Content Of A Directory In An IFRAME

// Create a list of files or folders and store them in an array
function makefilelist($folder, $filter, $sort=true, $type="files") {
   $res = array();
   $filter = explode("|", $filter); 
   $temp = opendir($folder);
   while ($file = readdir($temp)) {
      if ($type == "files" && !in_array($file, $filter)) {
         if (!is_dir($folder.$file)) $res[] = $file;
      } elseif ($type == "folders" && !in_array($file, $filter)) {
         if (is_dir($folder.$file)) $res[] = $file;
      }
   }
   closedir($temp);
   if ($sort) sort($res);
   return $res;
}

<?php
makefilelist ("downloads/");
$files = $res;