Is user logged in

if (!is_user_logged_in())

Get Logged In User ID

$user_id = get_current_user_id();

Is user an administrator?

if (current_user_can('administrator'))

Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.

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