3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = new \DateTime('2017-07-17'); $firstDayOfMonth = new \DateTime($input->format('Y-m-01')); $order = (int)($input->format('n') / 7) + 1; if ($input->format('N') > $firstDayOfMonth->format('N')) $order++; var_dump($input->format('l')); var_dump($order);
Output for 7.0.0 - 7.0.31, 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 - 8.3.7
string(6) "Monday" int(2)
preferences:
170.73 ms | 404 KiB | 212 Q