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"If you are adding a new domain or subdomain, you must also point it (using DNS and Webserver) to the directory that contains index.php. Subdirectory sites can be added at will, without making changes to the Webserver."
Question: Is the index.php referred to here the WordPress index.php in the root directory? i.e., are the subdomains supposed to point to the original domain?
Yes, and Yes.
All the requests for any site in the Hive are handled by the same set of files. Hence the need for only one installation of WordPress.
Thanks ikailo. Now another query. I host with Godaddy and there's an option to create a subdomain that points to a sub-directory and then there's sub-domain forwarding so a can create toronto.site.com in site.com/directory or I can go to a panel and create toronto.site.com which forwards to site.com. (However, I don't see a DNS option although the documentation refers to it.)
Does this latter amount to the same thing as DNS forwarding? I forward to site.com?
You want to choose the option that points the domain or subdomain to a physical directory on the web server.
Anything labeled "Forwarding" is probably wrong.
FYI - do not confuse pointing the domain name to a directory on the webserver with DNS pointing. They are two different things.
DNS indicates which Server will handle the request (by assigning an IP address to a domain name).
What we are concerned about here is to tell the web server how to handle the request once it receives it. This is done by telling the server to look in the WordPress directory for any requests for any domains that are part of WP Hive.
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