Código PHP:
<?php
$path = ".";
$dir = opendir($path);
$element_list = array();
while ($elemento = readdir($dir))
{
$element = strtolower($elemento);
if ($element != '.' && $element != '..' && strpos($element, '.php') === false) {
$element_list[$element] = filemtime($path . '/' . $elemento);
}
}
arsort($element_list);
foreach (array_keys($element_list) as $elemento)
{
echo "<option value='$elemento'>$elemento</option>\r\n";
}
closedir($dir);
?>