Retrieve all values from a SQL table and add to a session

I'm using the following code to get all the data in my table:

$sql4 = mysqli_query($db, "SELECT * FROM login");
$exibe4 = mysqli_fetch_assoc($sql4);

It is working perfectly and is picking up all normal data.

But before, when it was a specific data, I added session like this:

$_SESSION['diasvip']=$exibe['diasvip'];

But now how I want ALL data do not know how to do!

$_SESSION['dados']=$exibe4['*'];

Obviously, this would not work, but only to illustrate my goal.