Online PHP editor | output for BCAYq

<?php declare(strict_types=1); error_reporting(-1); ini_set('display_errors', 'On'); /** * @param DateTimeImmutable $start * @param DateTimeImmutable $end * * @return Generator */ function remainingDaysPerMonthBetween(\DateTimeImmutable $start, \DateTimeImmutable $end): \Generator { while ($start < $end) { $diff = $start->diff(min( $start->modify('last day of this month'), $end )); yield [$start, $diff->days]; $start = $start->modify('first day of next month'); } } $start = new \DateTimeImmutable('2019-02-11'); $end = new \DateTimeImmutable('2019-04-23'); foreach (remainingDaysPerMonthBetween($start, $end) as [$date, $remainingDays]) { printf("%s: %d\n", $date->format('M'), $remainingDays + 1); }