3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $b = &$a; $c = (++$a) + ($a++); echo $c;
Output for hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
2
Output for 4.3.0 - 5.6.28
3