By now, it is possible without any plugin. WordPress allows you to edit a sites domain and path free of any restrictions once it is created. First of all: create a new site with an arbitrary but valid subdomain: After the site was created follow the »edit site« link in the confirmation message. Here you … Read more
I’ll skip steps related to sharing DB and sharing users data and meta, based on assumption that you’ve done it correctly. Let’s concentrate on wp-config.php of both sites. These are defines that MUST BE IDENTICAL for both sites: define(‘COOKIE_DOMAIN’, ‘.domain.com’); // your main domain define(‘COOKIEPATH’, “https://wordpress.stackexchange.com/”); define(‘COOKIEHASH’, md5(‘domain.com’)); // notice absence of a ‘.’ in … Read more
There is a plugin for that: WP XAMPP Multisite Subdomains. Unfortunately, there is no English description available. I’ll try that here. The following guide will set up a multi-site under mu.wp with subdomains. 1. Basic Installation Start with a fresh installation of WordPress and XAMPP. Create a network for subdomains. Do not create any sub … Read more
Easy solution would be adding this line to your wp-config.php of your admin server code. define( ‘WP_SITEURL’, ‘http://’ . $_SERVER[‘SERVER_NAME’]); Then you can access it without modifying the database option.