anchor.diff:      print/3,
       printf/3,
       sprintf/3,
  +    vprintf/4,
  +    vsprintf/4,
       str_replace/5,
       str_replace/6,
       strtolower/3,
  
positive.code:     str_split(Context, Line, Text, {1, 1}).
  
  -spec str_split(context(), line(),
      Text :: var_value(), Size :: var_value()) -> ephp_array() | undefined.
  
  str_split(Context, Line, _Text, {_, Size}) when not is_integer(Size) ->
      File = ephp_context:get_active_file(Context),
  
negative.code:     {print, [{alias, <<"echo">>}]},
      {printf, [pack_args]},
      {sprintf, [pack_args]},
      vprintf,
      vsprintf,
      str_replace,
      strtolower,
      strtoupper,
  