(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_documentThe FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
encoding
       The encoding name. The following values are supported: 
       "Shift-JIS", "UHC",
       "GBK" and "BigFive".
      
       An empty string resets the encoding to the default 
       PDFDocEncoding/Unicode scheme.