3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo date("Y-m-1", strtotime("first day of previous month") ) ;
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2013-11-1
Output for 4.3.0 - 5.2.17
1970-01-1