(PHP 4 >= 4.0.2, PHP 5, PHP 7)
fdf_set_flags — Sets a flag of a field
$fdf_document
, string $fieldname
, int $whichFlags
, int $newFlags
) : boolSets certain flags of the given field.
fdf_documentThe FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
fieldnameName of the FDF field, as a string.
whichFlags
newFlags
成功时返回 TRUE， 或者在失败时返回 FALSE。