(PHP 4, PHP 5 < 5.3.0, PECL fdf SVN)
fdf_set_status — Set the value of the /STATUS key
   Sets the value of the /STATUS key. When a client
   receives a FDF with a status set it will present the value in an alert
   box.
  
fdf_documentThe FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
status
