[PHP]Zmiana rozszeżenia pliku podczas pobierania Opcje

[kuba_pilach]

Witam!
Mam kod pobierania:

[PHP] pobierz, plaintext 
//First, see if the file exists
       if (!is_file($name)) { die("<b>404 File not found!</b>"); }
 
       //Gather relevent info about file
       $len = filesize($name);
       $filename = basename($name);
       $file_extension = strtolower(substr(strrchr($filename,"."),1));
 
       //This will set the Content-Type to the appropriate setting for the file
       switch( $file_extension ) {
	   case "txt": $ctype="text/plain"; 
	   case "csv": $ctype="text/plain";
         break;
 
         default: $ctype="application/force-download";
       }
 
       //Begin writing headers
       header("Pragma: public");
       header("Expires: 0");
       header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
       header("Cache-Control: public");
       header("Content-Description: File Transfer");
 
       //Use the switch-generated Content-Type
       header("Content-Type: $ctype");
 
       //Force the download
       @$header="Content-Disposition: attachment; filename=".$filename.";";
       header($header );
       header("Content-Transfer-Encoding: binary");
       header("Content-Length: ".$len);
       @readfile($name);
       exit;
[PHP] pobierz, plaintext 

No i oczywiście ob_start i ob_end_flush() nie braknie... ;]
Ale cały czas pobiera w txt... jak zmienić na sta ?