[Resolved] Display name not Username

[krysttof]

i used this code in my template :

Code:

<?php
   if (file_exists(GSUSERSPATH.$author.'.xml')) {
      $data = getXML(GSUSERSPATH.$author.'.xml');
      $NAME = stripslashes($data->NAME);
   };
?>

And I have this error :

Code:

Notice: Undefined variable: author in /Users/mymac/Sites/gs32/theme/Simple DeepBlue/template.php on line 47