3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo date('Y-m-d', strtotime('+1 month', strtotime('2017/01/31')));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
2017-03-03

preferences:
174.1 ms | 404 KiB | 174 Q