3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = (new DateTime())->diff(new DateTime('1989-01-01')); var_dump($i->format('%y'));
Output for 5.4.0 - 5.4.45, 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 - 8.3.7
string(2) "26"
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.21, 7.0.0 - 7.0.6
string(2) "27"
preferences:
332.4 ms | 402 KiB | 230 Q