I have a directory full of files with the naming convention of yyyymm.xml I need to generate a list like this:

<ul>
 <li>2010
  <ul>
   <li>Dec</li>
   <li>Nov</li>
   ...
   <li>Feb</li>
   <li>Jan</li>
  </ul>
 </li>
 <li>2009
  <ul>
   <li>Dec</li>
    ...etc.
  </ul>
 </li>
</ul>

Benim en son denemesi:

<?php
$tempYear = 0;
date_default_timezone_set('Australia/Melbourne');
if ($handle = opendir('news')) {
   // Open the news dir
    echo "<p>News archive</p>";
    echo "<ul>";
    while (false !== ($file = readdir($handle))) {
        if ($file != "." && $file != "..") {
            $fileDate = basename($file, ".xml");
            $fileDate = $fileDate . "01";
            // Strip the .xml extention from the filename
            $currYear = date("Y", strtotime($fileDate));
            $currMonth = date("F");
            $archMonth = date("F", strtotime($fileDate));
            //echo "<li>$archMonth</li>";
            if ($currYear != $tempYear){
                echo "<li>$currYear";
                $tempYear = $currYear;
            }else{
                echo "<ul>";
                while ($currMonth != $archMonth){
                    echo "<li>$archMonth</li>";
                }
                echo "</ul>";
                echo "</li>";
            }
        }
    }
    echo "</ul>";
    closedir($handle);
}                   
?>