3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start_date = "06/25/2012"; $date = strtotime($start_date); $X=1; while ($X <= 10) { $X++; $date = strtotime("+1 weeks", $date); echo date('m/d/Y', $date)."\n"; }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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
07/02/2012 07/09/2012 07/16/2012 07/23/2012 07/30/2012 08/06/2012 08/13/2012 08/20/2012 08/27/2012 09/03/2012
preferences:
103.47 ms | 2177 KiB | 4 Q