使用单个查询将多行插入MYSQL

if ($valid) { //insert customer data to customer table
        $pdo = Database::connect();
        $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $sql = "INSERT INTO signups(FirstName,LastName,Email,Telephone,Address1,Address2,Address3,Zip,Added) values(?, ?, ?, ?, ?, ?, ?, ?, ?)";
        $q = $pdo->prepare($sql);
        $q->execute(array($FirstName,$LastName,$Email,$Telephone,$Address1,$Address2,$Address3,$Zip,$Added));
        $last_id_in=$pdo->lastInsertId();
        //echo $last_id_in;

        // insert product data into product table
        $productName= 'xxxxx';
        $price= '24.00';
        $sql1="INSERT INTO products (AutoID,productName,price) values(:last_id_in,:productName,:price)";
        $r = $pdo->prepare($sql1);
        $r->execute(array(':last_id_in'=>$last_id_in,':productName'=>$productName,':price'=>$price));
        //Database::disconnect();
        //header("refresh:3;url=create1.php");
}   

Hi, i need someone help please. i am working in project that have 2 tables signups, products. i have customer entry and product entry on same page. what i have until done is, creating a customer with Auto ID and getting that Auto ID (last_insert)id) to insert data to product table for that customer. So that i can fetch what produuct ordered by this customer if you see, the product is dynamic textfield, so i like to include that in an array. instead of $productname and $price as static. i need array that send multiple rows into table name products. thanks in advance.......