Multisites don’t have to be separate domains, they can be subfolders. You can have your root/original blog/site at / then put new sites at /es/ /fr/ etc etc. As for how you would copy your content to that site however, WordPress provides no solution here other than a manual copy/paste. You would need to reconstruct … Read more
You can use $wpdb to access any database you have access to (credentials for) so one site or the other could access its partner’s database or both could access a third database. It shouldn’t be hard but you will need to write most of the SQL to do it. If you are in a position … Read more
No sooner did I post than I ran across this forum thread. I had to go into Network Admin > Settings > Network Settings There, I had to select “User Accounts may be registered” in addition to entering a 1 in the site settings area. Problem solved. Maybe this helps someone else.
Here is the procedure to properly migrate a WordPress Multisite. Step 1 – Move Database and Files The first step is to open your FTP client and upload the files from your computer to the server. Next, on your server set up your database and user, and use phpMyAdmin to import all the database tables. … Read more
In multisite installation there already is a default admin and super-admin role, and if standard capabilities are different than what you want you can modify them: A default set of capabilities is pre-assigned to each role, but other capabilites can be assigned or removed using the add_cap() and remove_cap() functions. New roles can be introduced … Read more
I have noticed that the code our friend shares has an error. Add the prefix twice. I share other code with this error resolved. <?php add_filter( ‘pre_user_login’, ‘sneakily_add_prefix_to_username’ ); function sneakily_add_prefix_to_username( $username ) { if ( ! current_user_can( ‘manage_network’ ) ) { $blog_id = get_current_blog_id(); $blog_details = get_blog_details( $blog_id ); $sanitized_path = str_replace( “https://wordpress.stackexchange.com/”, ”, … Read more
If you have a network, you don’t need multiple installs. I would just start researching networks more via the codex. http://codex.wordpress.org/Create_A_Network
Alright, finally I sorted it out – and it was a query error (embarrassing it is). Correct code: add_action( ‘wpmu_activate_user’, ‘promote_to_admin’, 99 ); function promote_to_admin( $user_id, $password, $meta ) { global $wpdb; $user = get_userdata( $user_id ); $email = $user->user_email; // You need to prepare query first to avoid SQL errors $query = $wpdb->prepare( “SELECT … Read more
You can use Multisite Clone Duplicator plugin.
300 sites within a multisite shouldn’t be a problem by itself. Just be aware that things scale out quickly when you are operating that many sites. In particular, the number of posts will grow fast, and depending on the type of site, the traffic can grow fast. 300 empty sites with no traffic can be … Read more