3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $b = 23; $f = function ($a) use ($b) { echo $a; echo $b; }; $f(1); $f(2);
based on BtPI5
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
123223