anchor.diff:  
   
   -spec strlen(context(), line(), String :: var_value()) -> integer().
  -
  +%% @doc retrieve the lenght of the string.
   strlen(_Context, _Line, {_,String}) when is_binary(String) ->
       byte_size(String);
   
  
positive.code:     byte_size(Text).
  
  -spec sprintf(context(), line(), [var_value()]) -> binary().
  
  sprintf(Context, Line, Values) when length(Values) < 2 ->
      File = ephp_context:get_active_file(Context),
      Error = {error, efewargs, Line, File, ?E_WARNING, {<<"sprintf">>}},
  
negative.code:     undefined.
  
  -spec ord(context(), line(), String :: var_value()) -> integer().
  %% @doc obtain the number of the character passed as a param.
  ord(_Context, _Line, {_,<<I:8/integer,_/binary>>}) ->
      I;
  
  