3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strtotime("First Sun of Next Month", 1448933400); ?>
Output for 5.5.0 - 5.5.38, 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 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
1451775600
Output for 7.3.32 - 7.3.33, 8.0.13
1451779200
preferences:
172.23 ms | 402 KiB | 227 Q