Php ORA-01722错误消息

我试图将一些数据输入到oracle表中，收到错误代码ORA-01722。我相信这是因为交易员ID是一个数字，但它说它不能将字符串转换为数字。代码如下

形式

错误代码警告：oci_execute（）[function.oci execute]：ORA-01722:第19行recipesql.php中的数字无效

$query = "INSERT INTO MEDIA (Media_Id, Name, MediaType, Recipe, Video_Link, Trader_ID) 
VALUES (MEDIA_seq.nextval,'$RecipeName','$MediaType','$Recipe','$Link','$TraderID')";

i、 e.

MEDIA_seq.nextval

未包含在

''

中。否则，它将被解释为

VARCHAR2

，并将其插入到

NUMBER

列中，导致出现

ORA-01722

//include connection
include ('PHP/connection.php');
//has form been submitted?
if(isset($_POST['Submit'])){
    $RecipeName=$_POST['Name'];
    $MediaType=$_POST['MediaType'];
    $Recipe=$_POST['Recipe'];
    $Link=$_POST['Video_Link'];
    $TraderID=$_POST['Trader_ID'];
//Insert data
$query = "INSERT INTO MEDIA
(Media_Id, Name, MediaType, Recipe, Video_Link, Trader_ID)
VALUES
('MEDIA_seq.nextval','$RecipeName','$MediaType','$Recipe','$Link','$TraderID')";

$runquery = oci_parse($connection,$query);
oci_execute($runquery);
} 
//to check if the if statement is working
else
{
    echo "Error";
}

$query = "INSERT INTO MEDIA (Media_Id, Name, MediaType, Recipe, Video_Link, Trader_ID) 
VALUES (MEDIA_seq.nextval,'$RecipeName','$MediaType','$Recipe','$Link','$TraderID')";