WordPress - Check if user is logged in

Question

I am fairly new to WordPress. On my homepage I have a navigation bar which I only want to show to people who are logged in as users.

In my header.php th

Answer 1

Try following code that worked fine for me

global $current_user;
get_currentuserinfo();

Then, use following code to check whether user has logged in or not.

if ($current_user->ID == '') { 
    //show nothing to user
}
else { 
    //write code to show menu here
}