3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 1; $b = array(2, 3); $arr = array(&$a, &$b[0], &$b[1]); $arr[0]++; $arr[1]++; echo $a; echo $b; ?>
Output for 5.5.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2 Notice: Array to string conversion in /in/UhfUL on line 7 Array
Output for 4.3.0 - 5.4.45
2Array