3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo date('Y-m-d h:i:s <br>', 1); echo date('Y-m-d h:i:s <br>', '1'); echo date('Y-m-d h:i:s <br>', -1);
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.4 - 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 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
1970-01-01 01:00:01 <bThu, 01 Jan 1970 01:00:01 +0100>1970-01-01 01:00:01 <bThu, 01 Jan 1970 01:00:01 +0100>1970-01-01 12:59:59 <bThu, 01 Jan 1970 00:59:59 +0100>
Output for 7.3.32 - 7.3.33, 7.4.26, 8.0.13
1970-01-01 12:00:01 <bThu, 01 Jan 1970 00:00:01 +0000>1970-01-01 12:00:01 <bThu, 01 Jan 1970 00:00:01 +0000>1969-12-31 11:59:59 <bWed, 31 Dec 1969 23:59:59 +0000>
Output for 4.3.0 - 4.3.10, 5.0.0 - 5.0.3
1970-01-01 01:00:01 <bThu, 1 Jan 1970 01:00:01 +0100>1970-01-01 01:00:01 <bThu, 1 Jan 1970 01:00:01 +0100>1970-01-01 12:59:59 <bThu, 1 Jan 1970 00:59:59 +0100>

preferences:
269.86 ms | 402 KiB | 381 Q