3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function add_four(&$bar){ $bar + 4; } $foo = 1; add_four($foo); $foo; print $foo.'-'.$to;
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: to in /in/rPEcs on line 9 1-
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: to in /in/rPEcs on line 9 1-