How to update value by Events in CodeIgniter 4

@iRedds,

Should I use function(&$array) here in my code?

PHP Code:

use CodeIgniter\Events\Events;

Events::on('add_value_to_array', function(&$array) {
    error_log("add_value_to_array" . PHP_EOL, 3, "events.txt");
    array_push($array, "new");
    return $array;
});