cookies php:无法使用isset()

Hi I'm trying to make a cookie that will remeber a login but it says: Cannot use isset() on the result of an expression (you can use "null !== expression" instead). Can some one please help me?

The code that doesn't work is:

if(isset($_COOKIE['user']['id'] && !empty(isset($_COOKIE['user']['id']))){
  ...
}

i edited the code to: if (isset ($_logincookie['cookie_user'] && !empty($_logincookie['cookie_user']))){

but still the same problem

Pay attention to the brackets. Also.. there is no need for isset and empty to be used on the same variable. empty verifies also if the variable is set:

if(!empty($_COOKIE['user']['id'])){
    // do something
}