3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $dow = array("mon","tue","wed","thu","fri","sat","sun"); $pick_a_day = 1; foreach($dow as $inc => $an_element ) { echo $dow[($pick_a_day+(count($dow))) % (count($dow))-1]." ".$pick_a_day."\n"; $pick_a_day++; }
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
mon 1 tue 2 wed 3 thu 4 fri 5 sat 6 Notice: Undefined offset: -1 in /in/2o5TG on line 10 7
Output for hhvm-3.10.0 - 3.12.0
mon 1 tue 2 wed 3 thu 4 fri 5 sat 6 Notice: Undefined index: -1 in /in/2o5TG on line 10 7
Output for 4.3.0 - 5.2.17
mon 1 tue 2 wed 3 thu 4 fri 5 sat 6 Notice: Undefined offset: -1 in /in/2o5TG on line 10 7