Online PHP editor | refs for MQ4YH

<?php trait Stuff { function __invoke() { return 'I am ' . get_class($this) . '.'; } } class Thing { function __invoke() { return 'I am Thing.'; } } class Thang { use Stuff; } $things[] = function () { return 'I am Thong.'; }; $things[] = new Thing; $things[] = new Thang; $things[] = 'strlen'; $things[] = [$thing1, '__invoke']; $things[] = [$thang1, '__invoke']; var_dump(array_map('is_callable'), $things);