3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; $b = &$a; $c = (++$a)+(++$a); // 3 4 5 echo $c;
based on s0U4n
Output for 7.0.0 - 7.2.0
5
Output for 5.3.18 - 5.6.21
6