fdf_set_encoding Sets FDF character encoding boolfdf_set_encoding intfdf_document stringencoding 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 4.1.0 or later.