3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $sa=array(60 => array(1,5,6)); //print_r($sa); if($sa[40]!== "undefined"){echo implode($sa);}
Output for 5.3.0 - 7.2.0
Notice: Undefined offset: 40 in /in/v2BrJ on line 4 Notice: Array to string conversion in /in/v2BrJ on line 4 Array
Output for 4.3.0 - 5.2.17
Notice: Undefined offset: 40 in /in/v2BrJ on line 4 Notice: Array to string conversion in /in/v2BrJ on line 4 Array