3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); $a['foo'] = "Hello"; $a['foo']['bar'] = "World"; print_r($a);
Output for 5.4.0 - 7.1.0
Warning: Illegal string offset 'bar' in /in/PjKlE on line 4 Array ( [foo] => Wello )
Output for 4.3.0 - 5.3.29
Array ( [foo] => Wello )