3v4l.org

run code in 300+ PHP versions simultaneously
<?php $testArray = array(-1, 0, 1, "Feb"); for($i = 0, $size = count($testArray); $i < $size; ++$i) { $testDate = $testArray[$i]; echo $testDate, "\n"; echo strtotime($testDate), "\n"; echo date('r',strtotime($testDate)), "\n\n"; }
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.1 - 5.5.5, 5.5.8, 5.5.12 - 5.5.32, 5.5.34, 5.5.36 - 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 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
-1 1387642812 Sat, 21 Dec 2013 17:20:12 +0100 0 Thu, 01 Jan 1970 01:00:00 +0100 1 Thu, 01 Jan 1970 01:00:00 +0100 Feb 1361401200 Thu, 21 Feb 2013 00:00:00 +0100
Output for 7.3.32 - 7.3.33, 8.0.13
-1 1387639212 Sat, 21 Dec 2013 15:20:12 +0000 0 Thu, 01 Jan 1970 00:00:00 +0000 1 Thu, 01 Jan 1970 00:00:00 +0000 Feb 1361404800 Thu, 21 Feb 2013 00:00:00 +0000
Output for 5.5.0, 5.5.6 - 5.5.7, 5.5.9, 5.5.11, 5.5.33, 5.5.35
-1 1387642813 Sat, 21 Dec 2013 17:20:13 +0100 0 Thu, 01 Jan 1970 01:00:00 +0100 1 Thu, 01 Jan 1970 01:00:00 +0100 Feb 1361401200 Thu, 21 Feb 2013 00:00:00 +0100
Output for 5.5.10
-1 1387642812 Sat, 21 Dec 2013 17:20:13 +0100 0 Thu, 01 Jan 1970 01:00:00 +0100 1 Thu, 01 Jan 1970 01:00:00 +0100 Feb 1361401200 Thu, 21 Feb 2013 00:00:00 +0100
Output for 5.1.0 - 5.1.6
-1 1387642812 Sat, 21 Dec 2013 17:20:12 +0100 0 Thu, 01 Jan 1970 01:00:00 +0100 1 Thu, 01 Jan 1970 01:00:00 +0100 Feb Thu, 01 Jan 1970 01:00:00 +0100
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.4 - 5.0.5
-1 -1 Thu, 01 Jan 1970 00:59:59 +0100 0 1387580400 Sat, 21 Dec 2013 00:00:00 +0100 1 1387584000 Sat, 21 Dec 2013 01:00:00 +0100 Feb -1 Thu, 01 Jan 1970 00:59:59 +0100
Output for 4.3.0 - 4.3.10, 5.0.0 - 5.0.3
-1 -1 Thu, 1 Jan 1970 00:59:59 +0100 0 1387580400 Sat, 21 Dec 2013 00:00:00 +0100 1 1387584000 Sat, 21 Dec 2013 01:00:00 +0100 Feb -1 Thu, 1 Jan 1970 00:59:59 +0100

preferences:
307.66 ms | 402 KiB | 459 Q