3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo date('F', undef);
Output for 7.0.0 - 7.1.0
Notice: Use of undefined constant undef - assumed 'undef' in /in/DuTD4 on line 2 Warning: date() expects parameter 2 to be integer, string given in /in/DuTD4 on line 2
Output for 5.1.0 - 5.6.28
Notice: Use of undefined constant undef - assumed 'undef' in /in/DuTD4 on line 2 Warning: date() expects parameter 2 to be long, string given in /in/DuTD4 on line 2
Output for 4.3.0 - 5.0.5
Notice: Use of undefined constant undef - assumed 'undef' in /in/DuTD4 on line 2 January