Determines whether the current request should use themes.

Validates data for a site prior to inserting or updating in the database.

Delete a site.

Logs the user email, IP, and registration date of a new site.

Filters whether an empty comment should be allowed.

Filters the comment status links.

Filters the arguments for the comment query in the comments list table.

Fires before a site is deleted.

Fires after the site is deleted from the network.

Filters whether to trigger an error for _doing_it_wrong() calls.