3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $date = new \DateTime('first day of last month'); $date2 = new \DateTime('last month'); $date2->modify('first day'); echo $date->format('Y-m-d') . "\n"; echo $date2->format('Y-m-d') . "\n";
based on vBbsF
Output for 5.4.8 - 5.4.45, 5.6.28, 7.0.20 - 7.2.0
2015-09-01 2015-09-14
Output for 7.0.6
2016-04-01 2016-04-04
Output for 7.0.5
2016-03-01 2016-03-04
Output for 7.0.4
2016-02-01 2016-02-11
Output for 7.0.3
2016-02-01 2016-02-19
Output for 7.0.2
2016-02-01 2016-02-23
Output for 7.0.1
2016-02-01 2016-02-24
Output for 7.0.0
2016-02-01 2016-02-28
Output for 5.6.21
2016-04-01 2016-04-03
Output for 5.6.20
2016-03-01 2016-03-10
Output for 5.6.19
2016-02-01 2016-02-08
Output for 5.6.18
2016-02-01 2016-02-16
Output for 5.6.17
2016-02-01 2016-02-20
Output for 5.6.16
2016-02-01 2016-02-29
Output for 5.6.15
2016-02-01 2016-03-01
Output for 5.6.14
2016-03-01 2016-03-03
Output for 5.6.13
2016-03-01 2016-03-16
Output for 5.6.12
2016-03-01 2016-03-20
Output for 5.6.11
2016-03-01 2016-03-24
Output for 5.6.10
2016-03-01 2016-03-26
Output for 5.6.9
2016-03-01 2016-03-28
Output for 5.6.8
2016-03-01 2016-03-30
Output for 5.5.35
2016-04-01 2016-04-23
Output for 5.5.34
2016-03-01 2016-03-12
Output for 5.5.33
2016-02-01 2016-02-09
Output for 5.5.32
2016-02-01 2016-02-18
Output for 5.5.31
2016-02-01 2016-02-21
Output for 5.5.30
2016-03-01 2016-03-02
Output for 5.5.29
2016-03-01 2016-03-17
Output for 5.5.28
2016-03-01 2016-03-22
Output for 5.5.27
2016-03-01 2016-03-23
Output for 5.5.26
2016-03-01 2016-03-27
Output for 5.5.25
2016-03-01 2016-03-29
Output for 5.5.24
2016-04-01 2016-04-24
Output for 5.4.2 - 5.4.7
2015-09-01 2015-09-28
Output for 5.3.27 - 5.3.29
2015-09-01 2015-10-02
Output for 5.3.18 - 5.3.26
2015-10-01 2015-10-03