Wordpress- hook to auto login after registration

function _new_user_auto_log_in($user_id){ if(!is_user_logged_in()){ $secure_cookie = is_ssl(); $secure_cookie = apply_filters('secure_signon_cookie', $secure_cookie, array()); global $auth_secure_cookie; $auth_secure_cookie = $secure_cookie; wp_set_auth_cookie($user_id, true, $secure_cookie); $user_info = get_userdata($user_id); do_action('wp_login', $user_info->user_login, $user_info); } } add_action('user_register', '_new_user_auto_log_in');