3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $lastmonth = date('Y-m-01',mktime(0, 0, 0, date("m")-3, date("d"), date("Y"))); echo $lastmonth ; ?>
based on J0GFi
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2014-05-01