3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); $a[0][0] = true; var_dump($a);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(1) { [0]=> array(1) { [0]=> bool(true) } }
Output for hhvm-3.10.0

Process exited with code 153.