(PHP 4 >= 4.0.7, PHP 5 < 5.3.0, PECL fdf SVN)
fdf_set_encoding — Sets FDF character encoding
Sets the character encoding for the FDF document.
fdf_documentencodingShift-JIS", "UHC",
"GBK" and "BigFive".
An empty string resets the encoding to the default
PDFDocEncoding/Unicode scheme.