3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strtotime('2017-07-12');
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.21, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
1499810400
Output for 7.3.32 - 7.3.33, 7.4.26, 8.0.13
1499817600

preferences:
159.28 ms | 401 KiB | 200 Q