ho provato così:
<?php
$d = dir(".");
echo "Handle: " . $d->handle . "
\n";
echo "Path: " . $d->path . "
\n";
$ext=array_pop(explode(".",$filename));
while ($entry = $d->read()) {
echo $entry."
\n";
}
$d->close();
?>

e vedo solo questo:

Handle: Resource id #1
Path: .
.
..
1.txt
2.txt
index.php
logo.gif