# Pastebin diNbHNcw
function format_interval($from, $to) {
    try {
        $from_obj = $from instanceof DateTime ? $from : new DateTime($from);
        $to_obj = $to instanceof DateTime ? $to : new DateTime($to);
        $diff = $to_obj->diff($from_obj);

        $times = [];
        if ($diff->y) {
            $times[] = [$diff->y, 'year'];
            if ($diff->m) {
                    $times[] = [$diff->m, 'month'];
            }
        } elseif ($diff->m) {
            $times[] = [$diff->m, 'month'];
        } elseif ($diff->d) {
            $times[] = [$diff->d, 'day'];
        } else {
            $eolPeriod = 'midnight';
        }
        if ($times) {
            $eolPeriod = implode(', ',
                                        array_map(
                                            function ($t) {
                                                return "$t[0] $t[1]" .
                                                        ($t[0] != 1 ? 's' : '');
                                            },
                                            $times
                                        )
                                );

            if ($diff->invert) {
                $eolPeriod = "$eolPeriod ago";
            } else {
                $eolPeriod = "in $eolPeriod";
            }
        }
    } catch (Exception $e) {
        $eolPeriod = 'unknown';
    }

    return $eolPeriod;
}