Problema readdir

[var]

prova così:

<?php

if ($dir = @opendir("midi")) {

  while (($file = readdir($dir)) !== false) { 
    $file=str_replace(' ', '%20', $file); 
    echo "<a href=midi/$file>$file</a>"."
";

  }  

  closedir($dir);

}

?>

ciao