3v4l.org

run code in 200+ 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 jPdtA
Output for 7.2.0
Warning: Use of undefined constant lastmonth - assumed 'lastmonth' (this will throw an Error in a future version of PHP) in /in/J0GFi on line 3 lastmonth
Output for 4.3.0 - 7.1.10
Notice: Use of undefined constant lastmonth - assumed 'lastmonth' in /in/J0GFi on line 3 lastmonth