(PHP 3 >= 3.0.6, PHP 4, PHP 5)
Saves a FDF document.
fdf_document
The FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
filename
If provided, the resulting FDF will be written in this parameter. Otherwise, this function will write the FDF to the default PHP output stream.
Returns TRUE on success or FALSE on failure.