PHP directory display contenuto

[Yoda87]

Ciao a tutti, ho questo codice PHP, funziona in parte, mi spiego meglio... ottengo i link degli album ma quando ci clicco non riesco a vedere il contenuto della cartella... non capisco dove sia l'errore:

<?php   
$page = $_SERVER['PHP_SELF'];  
//settings 
$column = 3;  
//directories 
$base = "folder"; 
$thumbs = "thumbs";  
// get album 
$get_album = $_GET['album'];  
//if no album selected
 if (!$get_album) {        
 echo "[b]Select an album:[/b]

";  
//find each album and display as links         
$handle = opendir($base);         
while (($file = readdir($handle))!==FALSE)         {                 
if (is_dir($base."/".$file) && $file != "." && $file != ".." && $file != $thumbs)                 {                         
echo "[url='$page?album=$file']$file[/url]
";                 }         }         closedir($handle); } 
else {         
//check if album exist, and additional security checks         
if (!is_dir($base."/".$get_album) || strstr($get_album,".") !=NULL || strstr($get_album,"/") !=NULL)         {        
echo "Album doesn't exist.";         } 
else {         
$x = 0;        
 echo "[b]$get_album[/b]

";        
 $handle = opendir($base."/".$get_album);         
while (($file = readdir($handle)) !== FALSE)         {                
 if ($file != "." && $file != "..")                 {                 
echo "<table style='display:inline;'><tr><td><a href='$base/$get_album/$files' ref='lightbox'[img]$base/$thumbs/$file[/img]</a></td></tr></table>";                 
$x++;                               
  if ($x==$column)                 {                         
echo"
";                        
 $x = 0;                 }           }         }        
 closedir($handle);                 
echo "

[url='$page']Back to albums[/url]"; 
 } } 
 ?>

Grazie!