3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Everything you enter here will be executed by our servers. Try it! $t = gmmktime(11, 59, 59, 9, 2, 2013); echo $t, "\n"; echo $t - (12*3600), "\n"; echo gmdate('Y-m-d H:i:s', $t), "\n"; echo gmdate('Y-m-d H:i:s', $t - 12 * 3600), "\n";
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
1378123199 1378079999 2013-09-02 11:59:59 2013-09-01 23:59:59

preferences:
251.08 ms | 405 KiB | 348 Q