bool fdf_set_encoding
(int fdf_document, string encoding)
fdf_set_encoding() sets the character encoding in FDF document fdf_document. encoding should be the valid encoding name. The valid encoding name in Acrobat 5.0 are "Shift_JIS", "UHC", "GBK","BigFive".
The fdf_set_encoding() is available in PHP-4.0.7 or later.