3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "0"; $c = $b = empty($a); $d = ++$b + $a; #echo $d; echo $b;
based on OKA7K
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0beta1
1