How to check using PHP FTP functionality if folder exists on server or not?

Is there a way to check if a a folder exists on the server using PHP Ftp functionality?

From stackoverflow

• There is no 'exists' function for ftp connections in php.

  You could try ftp_chdir and check the result

• For PHP 5:

  is_dir('ftp://user:password@example.com/some/dir/path');
  

  http://uk.php.net/manual/en/function.is-dir.php : "As of PHP 5.0.0, this function can also be used with some URL wrappers."

  http://uk.php.net/manual/en/wrappers.ftp.php : [Support] "As of PHP 5.0.0: filesize(), filetype(), file_exists(), is_file(), and is_dir()"