Add a user to the current blog based on details from maybe_add_existing_user_to_blog().
Note: 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 add_user_to_blog().
<?php add_existing_user_to_blog( $details ) ?>
add_existing_user_to_blog() is located in wp-includes/ms-functions.php
maybe_add_existing_user_to_blog(), add_user_to_blog(), remove_user_from_blog(), add_new_user_to_blog()