3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = 0; $a = array(&$x); // [&0] $b = $a; // [&0] $x = 2; // a=[&2], b=[&2] unset($x); // //$b[1]++; $b[0]++; echo $a[0], ' ', $b[0];
based on eO9AR
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
2 3
Output for hhvm-3.10.0

Process exited with code 153.