是否有諸如Null合並運算符之類的稱為空合並運算符的東西

Question

PHP 7添加了null合並運算符 ：

// Fetches the value of $_GET['number'] and returns 'nonumber -NULL'
// if it does not exist.
$username = $_GET['number'] ?? 'No Number';
// This is equivalent to:
$username = isset($_GET['number']) ? $_GET['number'] : 'No Number';

還有空的東西嗎？

尋找類似的東西，

/ Fetches the value of $_GET['number'] and returns '0' Empty
// if it does not empty.
$username = $_GET['number'] ?? 'no number or number is 0 or empty';

Answer 1

是的，感謝短三元運算符類型的強制類型?: