public static function csplit($string, $delimiter = ',')
    {
        if (is_array($string)) {
            return $string;
        }
        $res = [];
        foreach (explode($delimiter, $string) as $k => $v) {
            $v = trim($v);
            if (strlen($v)) {
                array_push($res, $v);
            }
        }

        return $res;
    }