3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = strtotime('2014-09-01'); $end = strtotime('2014-10-02'); $stamp = $start; $months = array(); do { $next_stamp = mktime(0,0,0, date('n',$stamp)+1, 1, date('Y',$stamp)); $next_stamp = min($next_stamp, $end); $months[] = ceil(($next_stamp-$stamp)/3600/24)/date('t', $stamp); $stamp = $next_stamp; } while ($stamp < $end); var_dump($months);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [0]=> float(1) [1]=> float(0.03225806451612903) }
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 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
array(2) { [0]=> float(1) [1]=> float(0.032258064516129) }

preferences:
229.28 ms | 404 KiB | 346 Q