Php PDO无法插入记录

在这里，我试图使用下面的代码将我的记录插入数据库。我面临着一个奇怪的问题。当我插入数据时，我得到以下错误

注意：未定义索引：city_state

注意：未定义索引：country

查询失败SQLSTATE[23000]：完整性约束冲突：1048列“GuestState”不能为空

但是当我删除这两个

$cstate=$\u POST['city\u state']

，

$ccountry=$\u POST['country']

时，它会正确插入剩余的数据。我是php pdo的新手。我不知道我在哪里出错了？为什么这两个东西不将数据存储到数据库中

$cstate = $_POST['city_state'];
$ccountry = $_POST['country'];   
try
    {
        $db = $conn->prepare("INSERT INTO ebvouchers ( VoucherReference, BookingDate, CheckIndate, CheckOutDate, MealPlanID_Fk, RoomTypeID_Fk, GuestName, TotalAdults, Childrens, Infants, GuestPhone, GuestEmail, GuestFax, GuestAddressLine1, GuestAddressLine2, GuestRegion, GuestCity, GuestState, GuestCountry, GuestCurrency, GuestCurrencyTo, CurrencyAmount, GuestCurrencyValue ) VALUES ( :reference, :refdate, :ccin, :cout, :r_key, :r_key, :gname, :totaladults, :childrens, :infants, :gphone, :gemail, :gfax, :gaddress1, :gaddress2, :gregion, :city, :state, :country, :currency, :currencyto, :amount, :currencyvalue )");
        $db->execute(array(':reference'=>$creference, ':refdate'=>$crefdate, ':ccin'=>$ccin, ':cout'=>$cout, ':r_key'=>$ref_key, ':gname'=>$cgname, ':totaladults'=>$ctotaladults, ':childrens'=>$cchildrens, ':infants'=>$cinfants, ':gphone'=>$cgphone, ':gemail'=>$cgemail, ':gfax'=>$cgfax, ':gaddress1'=>$cgaddress1, ':gaddress2'=>$cgaddress2, ':gregion'=>$cregion, ':city'=>$ccity, ':state'=>$cstate, ':country'=>$ccountry, ':currency'=>$ccurrency, ':currencyto'=>$ccurrencyto, ':amount'=>$camount, ':currencyvalue'=>$ccurrencyvalue ));
    }
    catch(PDOException $e)
    {
        echo 'Query Failed'.$e->getMessage();
    }

该错误本身表明，城市/州和国家不是POST参数中定义的索引

---

检查HTML表单并将这些参数发布到服务器，然后检查。

问题是，

$\u post

不包括两个值：

$\u post['city\u state']

和

$\u post['country']

响应这两个值并放置模具；echo$cstate=$\u POST['city\u state']；echo$ccountry=$_POST['country']；死亡要检查它们是否有值…还有一种方法可以在数据库中设置默认值。您还有2x

：r\u key，：r\u key

@Fred ii-这两个键用于MealPlanID\u Fk，RoomTypeID\u Fk。。

Notice: Undefined index: city_state

Notice: Undefined index: country