3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['a' => []]; $a['a']['b'] = ['c' => 1]; echo $a;
based on JIrJe
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
Notice: Array to string conversion in /in/oCHQi on line 5 Array