(PHP 4 >= 4.3.0, PHP 5, PHP 7)
fdf_set_target_frame — Set target frame for form display
$fdf_document
   , string $frame_name
   )Sets the target frame to display a result PDF defined with fdf_save_file() in.
fdf_documentThe FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
frame_nameThe frame name, as a string.
   Returns TRUE on success or FALSE on failure.