Online PHP editor | refs for 532He

<?php $x = false; var_dump($x !== "" && $x == null); $x = 0; var_dump($x !== "" && $x == null); $x = array(); var_dump($x !== "" && $x == null); $x = 0.0; var_dump($x !== "" && $x == null); $x = null; var_dump($x !== "" && $x == null); // undefined var var_dump($y !== "" && $y == null);