3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function add_four(&$bar){ $bar + 4; } $foo = 1; $to = add_four($foo); $foo; print $foo.'-'.$to;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1-