fdf_save

(PHP 4, PHP 5, PHP 7)

fdf_save — Save a FDF document

bool fdf_save ( resource $fdf_document [, string $filename ] )

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.

成功时返回 TRUE，或者在失败时返回 FALSE。