3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strtotime('2038-01-01'); echo strtotime('2038-02-01'); echo strtotime('2038-03-01'); echo strtotime('2038-04-01'); echo strtotime('2040-01-01');
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
21459132002148591600215101080021536856002208985200
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 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30
21459132002148591600215101080021536892002208985200
Output for 7.3.32 - 7.3.33, 8.0.13
21459168002148595200215101440021536928002208988800
preferences:
246.54 ms | 402 KiB | 331 Q