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This document uses PHP Chinese website manual Release
(PHP 4, PHP 5, PHP 7)
fdf_get_file — Get the value of the /F key
$fdf_document
)Gets the value of the /F key.
fdf_document
The FDF document handle, returned by fdf_create() , fdf_open() or fdf_open_string() .
Returns the key value, as a string.