class GetSettings
{
    private array $newsSettings = [1, 22, 25];
    
    public function get($settingName)
    {
        if (property_exists($this, $settingName)) {
            return $this->{$settingName};
        } else {
            return  false;
        }
    }

    public function getAll()
    {
        return get_object_vars($this);
    }
}

$CSettings = new GetSettings;
$setting = $CSettings->get('newsSettings');
или так
$CSettings = new GetSettings;
$arSettings = $CSettings->getAll();