Alter existing code to return second-greatest value (MAX function)

[taranator]

I need to alter the following code snippet so that the second-greatest value in the array is returned.

        $dfs = [20727, 20733, 20739, 20746, 20753, 20757];
        $dfvs = [];
        foreach ($dfs as $df) {
            $dfvs[$df] = utils::get_diary_field_value($case_id, $df);
        }
        return max($dfvs);

I don't want to break anything and I'm a total noob, so your assistance is very much appreciated.

[Barand]

Sort into descending order

Get the second element.