Does the user_register change in multisite?

Question

I've created a function that automatically creates a new post for people when they register. It works great on a standard site but in multisite it stops working. I've spent hours trying to debug it. Is there a better hook to use than user_register in multisite?

Answer 1

There is the action hook wpmu_new_user.

/*
 * Create a user.
 *
 * This function runs when a user self-registers as well as when
 * a Super Admin creates a new user. Hook to 'wpmu_new_user' for events
 * that should affect all new users, but only on Multisite (otherwise
 * use 'user_register').