function.fread geeft een fout melding.

Warning:  fread() [<a href='function.fread'>function.fread</a>]: 
Length parameter must be greater than 0 in C:\server\Root\mcl\admin\bewerken.php on line 189

Warning:  fread() [<a href='function.fread'>function.fread</a>]: 
Length parameter must be greater than 0 in C:\server\Root\mcl\admin\bewerken.php on line 189

<?php
  if(file_exists($dir."/".$filename)) {
    $handle = fopen($dir."/".$filename, "rt"); // open to (r)ead, (t)ext file
    echo htmlentities(fread($handle, filesize($dir."/".$filename)));
    fclose($handle);
  }
?>

<?php
  if(file_exists($dir."/".$filename)) {
    $handle = fopen($dir."/".$filename, "rt"); // open to (r)ead, (t)ext file
    echo htmlentities(fread($handle, filesize($dir."/".$filename)));
    fclose($handle);
  }
?>

filesize($dir."/".$filename);

filesize($dir."/".$filename);