WordPress at a glance
action is not described

added_existing_user action-hook . WP MU

Fires immediately after an existing user is added to a site.

Usage

add_action( 'added_existing_user', 'action_function_name_6002', 10, 2 );
function action_function_name_6002( $user_id, $result ){
	// action...
}
$user_id(int)
User ID.
$result(mixed)
True on success or a WP_Error object if the user doesn't exist or could not be added.

Notes

  • Since MU (3.0.0)

Where the hook is called

add_existing_user_to_blog()
wp-includes/ms-functions.php 2126
do_action( 'added_existing_user', $details['user_id'], $result );

Where the hook is used (in WP core)

Does not used.