How can I login as admin after redirect to custom login page

Question

I have created a dynamic link button that links to Buddypress user profile. A login user that clicks on this button will be brought to user's profile. However, a guest that clicks on this button will be by default redirected to WP login page. I want a user to be redirected to my custom login page. How can I do that?

I've tried this code. It works. It redirects to my custom login page. But how can I login to WP as admin in order to go to admin dashboard? As I go to wp-login.php, it will redirect me to my custom page in stead.

add_action('init','possibly_redirect');

function possibly_redirect(){
    global $pagenow;
    if( 'wp-login.php' == $pagenow ) {
        wp_redirect('http://localhost/test/login/');
        exit();
    }
}

Answer 1

There is no reason to redirect the logged-in users. So I would recommend that you add another conditional and redirect the users only if they are not logged in:

add_action('init','possibly_redirect');
function possibly_redirect(){
    global $pagenow;
    if( 'wp-login.php' == $pagenow && ! is_user_logged_in()) {
        wp_redirect('http://localhost/test/login/');
        exit();
    }
}

This way you won't be redirected after login.