3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo date("Y-W",strtotime("2014W02 -1 weeks"));
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
2013-01
Output for 5.0.5
2014-03
Output for 5.0.0 - 5.0.4
2014-3
Output for 4.4.1 - 4.4.9
1970-01
Output for 4.3.0 - 4.4.0
1970-1