[Defender] - Exclude site ids from using 2FA in a WordPress MultiSite installation

defender-exclude-2fa-siteids.php

<?php
/**
* Plugin Name: [Defender] - Exclude Site ids from 2FA
* Plugin URI: https://premium.wpmudev.org/
* Description: Exclude site ids from using 2FA in a WordPress MultiSite installation
* Author: Panos Lyrakis @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*/

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( ! class_exists( 'WPMUDEV_Defender_Exclude_2FA' ) ) {
    
    class WPMUDEV_Defender_Exclude_2FA {

        public $site_ids                 	= array( 2, 3 );
        private static $_instance           = null;
       
        public static function get_instance() {

            if( is_null( self::$_instance ) ){
                self::$_instance = new WPMUDEV_Defender_Exclude_2FA();
            }
            return self::$_instance;
            
        }

        private function __construct() {
        	add_action( 'wp_login', [ $this, 'rm_passcode' ], 1, 2 );
        	add_action( 'admin_init', [ $this, 'release_profile' ] );
        	add_action( 'admin_init', [ $this, 'rm_user_box' ] );
        }

        protected function unhook( $tag, $hook_method, $hook_class ) {

        	global $wp_filter;			

			if ( ! isset( $wp_filter[$tag] ) ) {
				return;
			}

			foreach ( $wp_filter[$tag]->callbacks as $key => $callback_array ) {

				foreach ( $callback_array as $c_key => $callback ) {

					if ( substr_compare( $c_key, $hook_method, strlen( $c_key )-strlen( $hook_method ), strlen( $hook_method ) ) === 0 ) {

						if ( $callback['function'][0] instanceof $hook_class ){
							unset( $wp_filter[$tag]->callbacks[$key][$c_key] );
						}
					}
				}
			}
        }

        public function rm_user_box() {

        	if ( ! in_array( get_current_blog_id(), $this->site_ids )) {
				return;
			}

			$tag 			= 'show_user_profile';
			$hook_method	= 'showUsers2FactorActivation';
			$hook_class 	= 'WP_Defender\\Module\\Advanced_Tools\\Component\\Auth_Listener';

			$this->unhook( $tag, $hook_method, $hook_class );
        }


        public function release_profile() {

        	if ( ! in_array( get_current_blog_id(), $this->site_ids )) {
				return;
			}

			$tag 			= 'current_screen';
			$hook_method	= 'forceProfilePage';
			$hook_class 	= 'WP_Defender\\Module\\Advanced_Tools\\Component\\Auth_Listener';

			$this->unhook( $tag, $hook_method, $hook_class );
	
        }



        public function rm_passcode( $userLogin, $user ) {

        	if ( ! in_array( get_current_blog_id(), $this->site_ids )) {
				return;
			}

			//update_user_meta( $user->ID, 'defenderAuthOn', 1 );
			//update_user_meta( $user->ID, 'defenderForceAuth', 1 );

			$tag 			= 'wp_login';
			$hook_method	= 'maybeShowOTPLogin';
			//$hook_class 	= 'WP_Defender\\Module\\Advanced_Tools\\Controller\\Main';
			$hook_class 	= 'WP_Defender\\Module\\Advanced_Tools\\Component\\Auth_Listener';

			$this->unhook( $tag, $hook_method, $hook_class );				

        }

    }

	if ( ! function_exists( 'wpmudev_defender_exclude_2fa' ) ) {

        function wpmudev_defender_exclude_2fa() {
            return WPMUDEV_Defender_Exclude_2FA::get_instance();
        };

        add_action( 'plugins_loaded', 'wpmudev_defender_exclude_2fa', 10 );
    }

}