3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array('a'=>'aaa','b'=>'bbb'); foreach($a as $key){echo $a[$key];}
Output for 5.3.0 - 7.2.0
Notice: Undefined index: aaa in /in/l6WIi on line 4 Notice: Undefined index: bbb in /in/l6WIi on line 4
Output for 4.3.0 - 5.2.17
Notice: Undefined index: aaa in /in/l6WIi on line 4 Notice: Undefined index: bbb in /in/l6WIi on line 4