3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo date('N',"2014-04-20");
Output for 5.1.0 - 7.2.0
Notice: A non well formed numeric value encountered in /in/lJkWX on line 3 4
Output for 4.3.0 - 5.0.5
N