check if you are logged in to a specific session

Question

Good afternoon, guys. I’m in trouble and I can’t think of a better place to fix this than here:

I have a website that both admin logins with access to common roles and members will access. The doubt is on how I will separate to only display the functions to the administrators, because until then I was using this:

session_start();

if(!isset($_SESSION["email"]) || !isset($_SESSION["senha"])){
    session_write_close();
    header("Location: index.php");
    exit; //encerra todas as funções e leva para o index
}
else{
    echo "<center>Você está logado.</center>";
}

But now that I’ve put in the membership register I don’t know what to do. Thank you!