3v4l.org

run code in 300+ PHP versions simultaneously
<?php $month = 9; $year = 2014; $start = mktime(0, 0, 0, $month, 1, $year); for ($now = $start; date('n', $now) != $month; $now += 86400) { echo date('Y-m-d l') . PHP_EOL; } ?>

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42.91 ms | 402 KiB | 5 Q