3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( mktime(PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX), date('Y-m-d H:i:s', mktime(PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX)) );
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
int(9223371974650507795) string(27) "292277024625-10-02 22:09:55"
preferences:
42.95 ms | 406 KiB | 5 Q