Online PHP editor | refs for MNJfS

<?php $result = 0; $result2 = 10; $one = function() { var_dump($result); }; $two = function() use ($result) { var_dump($result); }; $three = function() use (&$result) { var_dump($result); }; $four = function($r) use (&$result) { var_dump($r); }; $result++; $one(); // outputs NULL: $result is not in scope $two(); // outputs int(0): $result was copied $three(); // outputs int(1) $four($result2);