WP Multisite fix for WP install in a directory

wp-mu-in-subdirectory.php

<?php

/*
Our Wordpress is located in https://our-site.com/wordpress

Here's the relevant part of our wp-config.php

define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', true);
define('DOMAIN_CURRENT_SITE', 'our-site.com');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

However the "Lost your password" URL on http://our-site.com/wordpress/login.php it then set to: https://our-site.com/wp-login.php?action=lostpassword - so the /wordpress part is missing.

Put this into wp-content/mu-plugins
*/

define('FV_PATH_CURRENT_SITE', '/site/');

add_filter( 'network_site_url', 'fv_network_site_url' );

function fv_network_site_url( $url ) {
  $current_site = get_current_site();
  
  if( strcmp($current_site->domain. $current_site->path, $current_site->domain.FV_PATH_CURRENT_SITE) ) {
    $url = str_replace( $current_site->domain. $current_site->path, $current_site->domain.FV_PATH_CURRENT_SITE, $url );
  }
  
  return $url;
}