3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo $x = strtotime ("First of last month"); echo "\n".date('c', $x); echo "\n"; echo mktime (0,0,0,4,1,2015);
Output for 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 - 5.6.40, 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
1970-01-01T01:00:00+01:00 1427839200
Output for 7.3.32 - 7.3.33, 8.0.13
1970-01-01T00:00:00+00:00 1427846400
Output for 5.0.0 - 5.0.5
-1 1970-01-01T00:59:59+01:00 1427839200
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
-1 c 1427839200
preferences:
325.04 ms | 402 KiB | 459 Q