My problem is as follows. I have a multisite running on a non-sub-domain install. I am trying to customise the welcome email a user receives upon registration.
I managed to customise the welcome email by overriding
wp_new_user_notification found in
pluggable.php see here, however this only overrides the message if you add a user through the top level network admin site, if you add through a lower level multisite the function does not apply.
Failing this I tried the following methods found on this site:
I am unsure quite how this works and if it could even be applied to what I am trying to achieve.
This produces a fatal already defined error.
Any advice on overriding files that aren't pluggable/anyone who has encountered this same problem would be great.