WordPress Daily Routine

Multisite setup fails or breaks due to missing definitions in wp-config.php.

Multisite Constants Missing

Key Points: Network settings disappear or produce errors when required constants are not defined.

You’ve enabled multisite, added your subsite… but nothing works. Logins fail, menus vanish, and the network admin is nowhere to be found. Chances are your wp-config.php is missing a few VIP lines.

🧩 Required Constants

define('WP_ALLOW_MULTISITE', true);
 define('MULTISITE', true);
 define('SUBDOMAIN_INSTALL', false); // or true
 define('DOMAIN_CURRENT_SITE', 'yourdomain.com');
 define('PATH_CURRENT_SITE', '/');
 define('SITE_ID_CURRENT_SITE', 1);
 define('BLOG_ID_CURRENT_SITE', 1);

🛠️ Fix Process

1. Double-check wp-config.php and add any missing definitions
2. Ensure you have matching entries in .htaccess (or NGINX block)
3. Clear browser cache and test again

🌐 Tip

Subdomain setups require wildcard DNS — if your new site loads a 404, that’s often the missing piece.