3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array(0 => 100, "color" => "red"); $keys = array_keys($array); print_r($keys[2]); ?>
based on GDJDM
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined offset: 2 in /in/V0e4u on line 5
Output for hhvm-3.10.0 - 3.13.2
Notice: Undefined index: 2 in /in/V0e4u on line 5
Output for 4.3.0 - 5.2.17
Notice: Undefined offset: 2 in /in/V0e4u on line 5