3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); $a['foo'] = 'Hello'; $a['foo']['bar'] = 'World'; var_dump($a);
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: Illegal string offset 'bar' in /in/1ASpc on line 4 array(1) { ["foo"]=> string(5) "Wello" }
Output for 4.3.0 - 5.3.29, hhvm-3.10.0 - 3.12.0
array(1) { ["foo"]=> string(5) "Wello" }