fdf_enum_values
  (PHP 4 >= 4.3.0, PHP 5, PHP 7)
fdf_enum_values — Call a user defined function for each document value 
  
 
 
  Description
  
   bool fdf_enum_values
    ( 
resource $fdf_document
   , 
callable $function
   [, 
mixed $userdata
  ] )
 
  WarningThis function is
currently not documented; only its argument list is available.