Radiobutton field, Extended Return Values

gistfile1.php

Array
(
    [selected_value] => Radiobutton 2
    [selected_radiobutton] => Array
        (
            [value] => Radiobutton 2
            [key] => radiobutton_num_3
            [is_selected] => 1
        )

    [radiobuttons] => Array
        (
            [0] => Array
                (
                    [value] => Radiobutton 1
                    [key] => radiobutton_num_2
                    [is_selected] => 
                )

            [1] => Array
                (
                    [value] => Radiobutton 2
                    [key] => radiobutton_num_3
                    [is_selected] => 1
                )

            [2] => Array
                (
                    [value] => Radiobutton 3
                    [key] => radiobutton_num_4
                    [is_selected] => 
                )

        )

)