3v4l.org

run code in 200+ 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 eMlZs
Output for 4.3.0 - 7.2.0
3 3