add_existing_user_to_blog( array|false $details = false )
(array|false) (Optional) User details. Must at least contain values for the keys listed below.
(int) The ID of the user being added to the current blog.
(string) The role to be assigned to the user.
Default value: false
(true|WP_Error|void) True on success or a WP_Error object if the user doesn’t exist or could not be added. Void if $details array was not provided.
This function is called by
maybe_add_existing_user_to_blog() and should not be called directly. This page is for informational purposes only. Use