3v4l.org

run code in 300+ PHP versions simultaneously
<?php $month = 9; $year = 2014; $start = mktime(0, 0, 0, $month, 1, $year); echo date('Y-m-d l', $start); for ($now = $start; date('n', $now) != $month; $now += 86400) { echo date('Y-m-d l', $now) . PHP_EOL; } ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2014-09-01 Monday
preferences:
242.92 ms | 405 KiB | 368 Q