Create multisite with subdirectories

Hello Laura,

You are correct that WordPress does have a restriction when it comes to creating a multisite network with subdirectories on websites that are older than 30 days due to issues with existing permalinks. The url to some of the pages on your site might be changed and cannot be accessed by you users.

Before making any changes, make sure to back up your website. This is a precaution in case something goes wrong.

However, there is a way to work around this restriction and set up a multisite network with subdirectories even for an older site. Add the following line to your wp-config.php file before setting up the network.

define('SUBDOMAIN_INSTALL', false);

This line forces WordPress to use subdirectories instead of subdomains for the multisite network

Let me know if you have further questions!

Hello, thank you for your response. When I add this line to the wp.config file (between the custom lines and “That’s all”), I immediately get a database error. Did I do something wrong? Thank you in advance for any help you can give me.

Kind regards, Laura

Hello,lauratu
To enable a multisite network with subdirectories on an existing WordPress site older than 30 days, you can follow these steps:

1. Backup Your Site: Always back up your WordPress site before making major changes.
2. Edit wp-config.php: Add define('WP_ALLOW_MULTISITE', true); just before the line /* That's all, stop editing! */.
3. Network Setup: Go to Tools > Network Setup, choose “subdirectories,” and follow the instructions to edit your wp-config.php and .htaccess files.
4. Modify .htaccess: WordPress will provide code to add to your .htaccess file to enable the multisite network with subdirectories.
5. Activate Network: Complete the setup and activate the network to start using subdirectories for your multisite setup.

This approach allows you to achieve the desired structure for language navigation without relying on additional plugins.

Hello Laura,

One possible issue could be that if the WordPress installation was initially set up as a multisite network using subdomains, the necessary database tables would have been created specifically for that configuration. Switching to subdirectories by setting SUBDOMAIN_INSTALL to false may cause errors because the required tables for subdirectory-based sites might not be present.

To check if the correct tables exist, look for tables such as wp_site, wp_blogs, and additional site-specific tables like wp_2_posts in your database.

I recommend trying this setup first on a staging server to avoid potential issues on your live site. You can refer to this guide as a reference.