if ($value > $largest_value) {
    ($largest_value, $second_value) = ($value, $largest_value);
    next; 
}
if ($value > $second_value) {
    $second_value = $value;
}

##</code><code>##

    ($largest_value, $second_value) = sort {$a <=> $b} $largest_value, $second_value, $value;