MainWP Bulk Settings Manager Extension supports Boilerplate tokens. By using tokens, it is possible to set per-site unique values in forms. Changing the WP > Settings > General Settings form is the best example of this.
In the WP General Settings, there are 2 fields that have to have unique values for each child site. Those are Site URL (siteurl) and WordPress Address (home). So to properly handle this form,
- Make sure that the Support for Boilerplate tokens is enabled
- Next, after creating the Key, find it in the list and Edit it
- Locate the siteurl and home key fields
- Replace the URL in key with the [site.url] token.
- Save settings.
By default, the [site.url] token values are set for each child site. But if you need to use any other token or even create a custom one, be sure that values are set for each child you are submitting the key to.