Latte\Runtime\Filters::length PHP 메소드

    public static function length($val)
    {
        if (is_array($val) || $val instanceof \Countable) {
            return count($val);
        } elseif ($val instanceof \Traversable) {
            return iterator_count($val);
        } else {
            return strlen(utf8_decode($val));
            // fastest way
        }
    }