Добавить значения массива в БД

<td><input type="text" class="form-control" name="mod[title][]" id="information_json_name[]" placeholder="Название поля"></td> 
<td><input type="text" class="form-control" name="mod[price][]" id="information_json_val[]" placeholder="Значение поля"></td>

 [mod] => Array 
        ( 
            [title] => Array 
                ( 
                    [0] => silver 
                    [1] => black 
                ) 
 
            [price] => Array 
                ( 
                    [0] => 111 
                    [1] => 222 
                ) 
 
        )

$sql_part = ''; 
        if (!empty($data['mod'])){ 
            foreach ($data['mod'] as $key => $value){ 
                foreach ($value as $val){ 
                    if ($key == 'title'){ 
                        $title = $val; 
                    } 
                    if ($key == 'price'){ 
                        $price = $val; 
                    } 
                } 
                $sql_part .= "('$title', $id, '$price'),"; 
            } 
        } 
 
        \R::exec("INSERT INTO modification (title, product_id, price) VALUES $sql_part");