3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dt = new DateTime('2019-01-31'); $day = $dt->format('d'); for ($i=1; $i <= 10; $i++) { $next = clone $dt; $next->add(new DateInterval("P{$i}M")); if ($next->format('d') != $day) continue; echo $next->format('Y-m-d') ."\n"; }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
2019-03-31 2019-05-31 2019-07-31 2019-08-31 2019-10-31
preferences:
86.39 ms | 1615 KiB | 4 Q