3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 1; echo (++$a)+(++$a); $a = 1; $b = &$a; echo (++$a)+(++$a);
Output for 7.0.0 - 7.1.0
55
Output for 4.3.0 - 5.6.28
56