Online PHP editor | output for Tgqcf

<?php function diffInMonth(DateTime $start,DateTime $end): int { $endDate = (clone $end)->setTimeZone($start->getTimeZone()); list($yearStart,$monthStart,$dayStart) = explode(" ",$start->format("Y m dHis")); list($yearEnd,$monthEnd, $dayEnd) = explode(" ",$endDate->format("Y m dHis")); $mothDiff = ($yearEnd - $yearStart) * 12 + $monthEnd - $monthStart; if($dayStart > $dayEnd && $end >= $start) --$mothDiff; elseif($dayStart < $dayEnd && $end < $start) ++$mothDiff; return $mothDiff; } $tests = [ ['start' => '2022-10-04', 'end' => '2022-11-04', 'month' => 1], ['start' => '2020-10-04', 'end' => '2022-11-04', 'month' => 25], ['start' => '2022-11-04', 'end' => '2020-10-04', 'month' => -25], ['start' => '2021-10-04 13:00', 'end' => '2022-11-04 13:00', 'month' => 13], ['start' => '2021-10-04 13:00', 'end' => '2022-11-04 12:59', 'month' => 12], ['start' => '2021-10-04 13:01', 'end' => '2022-11-04 13:00', 'month' => 12], ['start' => '2022-11-01 13:00 Europe/Berlin', 'end' => '2022-12-01 12:00 UTC', 'month' => 1], ]; foreach($tests as $test){ $start = new DateTime($test['start']); $end = new DateTime($test['end']); $month = diffInMonth($start, $end); $msg = $test['start']." - ".$test['end']; $msg .= ' : '.$month.' Month '.($month === $test['month'] ? 'Ok' : 'Error')."<br>\n"; echo $msg; }