Online PHP editor | refs for KVO3s

<?php $bool = false; echo 'is ', var_export($bool, true), 'empty? ', var_export(empty($bool)), "\n"; $str = (string)$bool; echo 'is ', var_export($str, true), 'empty? ', var_export(empty($str)), "\n"; $bool = (bool)$string; echo 'is ', var_export($bool, true), 'empty? ', var_export(empty($bool)), "\n";