3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(strtotime('1582-10-16T16:34:04+00:00')); var_dump(gmdate('r', strtotime('1582-10-16T16:34:04+00:00')));
Output for 5.0.0 - 5.0.5, 5.4.24 - 5.4.45, 5.5.8 - 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 - 7.3.33, 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 - 8.3.6
int(-12219146756) string(31) "Sat, 16 Oct 1582 16:34:04 +0000"
Output for 5.2.6 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.23, 5.5.0 - 5.5.7
int(-12219146756) string(31) "Sun, 16 Oct 1582 16:34:04 +0000"
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.5
bool(false) string(31) "Thu, 01 Jan 1970 00:00:00 +0000"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
int(-1) string(31) "Wed, 31 Dec 1969 23:59:59 +0000"

preferences:
295.84 ms | 402 KiB | 460 Q