(PHP 4, PHP 5, PHP 7)
Set the appearance of a field
bool fdf_set_ap ( resource $fdf_document, string $field_name, int $face, string $filename, int $page_number )
Sets the appearance of a field (i.e. the value of the /AP key).
Parameters:
fdf_document
The FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
field_name