3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $derp = mktime(0, 0, 0, date('n'), date('j') - date('w')); echo "\n".date('c', $derp);
based on QjvAe
Output for 5.0.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2014-08-24T00:00:00+02:00
Output for 4.3.0 - 4.4.9
c