3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a' => 'foo'); echo $a['foo']; echo $a[0];
Output for 5.3.0 - 7.1.0
Notice: Undefined index: foo in /in/EWdZb on line 5 Notice: Undefined offset: 0 in /in/EWdZb on line 6
Output for 4.3.0 - 5.2.17
Notice: Undefined index: foo in /in/EWdZb on line 5 Notice: Undefined offset: 0 in /in/EWdZb on line 6