lithium\template\view\adapter\Simple::_toString PHP Method

    protected function _toString($data)
    {
        foreach ($data as $key => $val) {
            switch (true) {
                case is_object($val) && !$val instanceof \Closure:
                    try {
                        $data[$key] = (string) $val;
                    } catch (Exception $e) {
                        $data[$key] = '';
                    }
                    break;
                case is_array($val):
                    $data = array_merge($data, Set::flatten($val));
                    break;
            }
        }
        return $data;
    }