3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f = new \DateTime('previous month first day of'); //$f->modify('first day of'); echo $f->format('Y-m-d H:i:s');
Output for 5.6.28, 7.0.20, 7.1.0 - 7.1.25, 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
2015-11-01 09:01:44
Output for 7.3.32 - 7.3.33, 8.0.13
2015-11-01 08:01:44
Output for 7.0.6
2016-04-01 13:06:19
Output for 7.0.5
2016-03-01 09:10:08
Output for 7.0.4
2016-02-01 21:16:04
Output for 7.0.3
2016-02-01 22:38:02
Output for 7.0.2
2016-02-01 04:51:29
Output for 7.0.1
2016-02-01 08:00:16
Output for 7.0.0
2016-02-01 09:53:41
Output for 5.6.21
2016-04-01 16:02:28
Output for 5.6.20
2016-03-01 08:11:59
Output for 5.6.19
2016-02-01 05:23:34
Output for 5.6.18
2016-02-01 14:19:16
Output for 5.6.17
2016-02-01 01:51:37
Output for 5.6.16
2016-02-01 10:43:11
Output for 5.6.15
2016-02-01 11:32:13
Output for 5.6.14
2016-03-01 17:14:33
Output for 5.6.13
2016-03-01 17:53:31
Output for 5.6.12
2016-03-01 08:22:28
Output for 5.6.11
2016-03-01 14:48:12
Output for 5.6.10
2016-03-01 16:53:43
Output for 5.6.9
2016-03-01 22:11:02
Output for 5.6.8
2016-03-01 06:50:52
Output for 5.5.35
2016-04-01 01:37:57
Output for 5.5.34
2016-03-01 10:25:28
Output for 5.5.33
2016-02-01 08:22:35
Output for 5.5.32
2016-02-01 18:15:12
Output for 5.5.31
2016-02-01 05:00:01
Output for 5.5.30
2016-03-01 13:24:34
Output for 5.5.29
2016-03-01 08:11:21
Output for 5.5.28
2016-03-01 11:40:34
Output for 5.5.27
2016-03-01 13:20:00
Output for 5.5.26
2016-03-01 19:34:34
Output for 5.5.25
2016-03-01 02:58:31
Output for 5.5.24
2016-04-01 09:23:52
preferences:
172.6 ms | 401 KiB | 198 Q