is_file() werkt niet...

$dir = "..";
$dh  = opendir($dir);
while (false !== ($filename = readdir($dh))) {
if (is_file($filename) == false){
   $files[] = $filename;
   }
}

$dir = "..";
$dh  = opendir($dir);
while (false !== ($filename = readdir($dh))) {
if (is_file($filename) == false){
   $files[] = $filename;
   }
}

if (is_file($filename) == false){
   $files[] = $filename;
   }
}

if (is_file($filename) == false){
   $files[] = $filename;
   }
}