How come I can't get dir list only

[daxxy]

I have this script

 <?php 

$real_path = realpath("test/"); 
$d = dir($real_path); 
while (false !== ($entry = $d->read())) 
{ 
  if($entry != "." && $entry != "..") 
  { 
    echo "<a href=\"$entry\">$entry</a>\n"; 
  } 
} 
$d->close(); 

?> 

All my fiddling either gets me an error or the list of files as well as the directories.
I'm trying to get DIRECTORIES only.
What is the trick here?

[samudasu]

add a call to is_dir to your if statement.