Displaying files of subdirectories

Hey.. I need some help about How can i list files with thin the subdirectories...
Following code only display the directories.. i want to display subdirectory files too. I dont want to display sub directory files on the index page..in the way that on the index file it shows the list of subdirectories.. and when i click on any subdirectory, it displays the files of that subdirectory. I would appriciate any help..

<?
$path = "./";
$dir_handle = @opendir($path) or die("Unable to open $path");
while ($file = readdir($dir_handle)) {
if($file == "." || $file == ".." || $file == "index.php" )
continue;
echo "<a href=\"$file\">$file</a><br />";
}
closedir($dir_handle);
?> 

PHP:

 

$dir = "/blah/blah/";

// Open a known directory, and proceed to read its contents
if (is_dir($dir)) {
   if ($dh = opendir($dir)) {
       while (($file = readdir($dh)) !== false) {
           echo "filename: $file : filetype: " . filetype($dir . $file) . "\n";
       }
       closedir($dh);
   }
}

PHP:

make your $dir dynamic instead of specifying your directory why not

$dir = $_GET['directory'];

<a href="<?=?directory=directorylieshere;?>">