Fatal error: Can't use function return value in write context的问题

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empty() 只检测变量,检测任何非变量的东西都将导致解析错误!

因此,我们不能拿empty来直接检测函数返回的值

if ((empty(session(‘admin_id‘))))
        {
            echo json_encode([‘message‘ => ‘请先登录‘,‘code‘=> 300]);
            die;
        }

以上是错误代码

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