"isset构造"是否有捷径?
问题描述：
我经常写这一行代码:
$myParam = isset($params['myParam']) ? $params['myParam'] : 'defaultValue';
通常，对于嵌套数组，这会使行很长.
Typically, it makes the line very long for nested arrays.
我可以把它缩短吗?
答
PHP 7将包含??运算符，正是该运算符.
PHP 7 will contain ?? operator that does exactly that.
请参见 https://wiki.php.net/rfc/isset_ternary ，例如:
// Fetches the request parameter user and results in 'nobody' if it doesn't exist
$username = $_GET['user'] ?? 'nobody';
// equivalent to: $username = isset($_GET['user']) ? $_GET['user'] : 'nobody';