3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dt = new DateTime('first Monday of this month'); $dt->modify('first Monday of this week'); echo $dt->format('d M');
Output for 5.6.28, 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
30 Nov
Output for 5.5.24, 5.5.35, 5.6.21, 7.0.6
02 May
Output for 5.5.25 - 5.5.30, 5.5.34, 5.6.8 - 5.6.14, 5.6.20, 7.0.5
28 Mar
Output for 5.5.31 - 5.5.33, 5.6.15 - 5.6.19, 7.0.0 - 7.0.4
29 Feb
preferences:
137.06 ms | 402 KiB | 182 Q