PHP：空合并运算符是否相反？

Question

I am often in a situation when the variable can be object or null.

When I put data into the database I have to stick with something like this:

// @var User|null $user
$data['id_user'] = $user!==null ? $user->getId() : null;

Is there any way to shorthen this? I am aware of ??, but this is somewhat opposite.

I am using PHP 7.1.

Answer 1

I don't think there's an operator that does precisely that.

The closest is the @ error-suppression operator:

$data['id_user'] = @$user->getId();

If $user->getId() gets an error, the error message is suppressed and the value is null.