Protect helpers and setup db connection for helpers

Hi,

in ci3 i see this line at top of my helpers
"if ( ! defined('BASEPATH')) exit('No direct script access allowed');"

is it recommend to use it in ci4 too?

By the way, do i need to initialise the db-connection on every helper function again, or is there a better way to support db connection in the helper functions i need?

"my_helperfunction($this){
$db = \Config\Database::connect();
..
}

my_helperfunction_next($this){
$db = \Config\Database::connect();
..
}

..."