INSERT INTO doesn't fill all rows - php

Question

I have a problem with my code, it is PayPal express Integration. I mean in its original state after some tweaking to match my database and so on it works, it fills rows with ex. payerID and so on.
I have in my database 2 tables - first is Products it has 5 Rows, like productID, Price, currency and so on, but I need 1 extra row - let's say we call it Credits. I manually added it to my database, filled Table Products with data.
Then I have another table called Orders- where I added Row called Credits too, than after successful payment+checkout matched Credits to chosen Product it should fill this Row Credits in Orders table. The problem that I have it that Order Table is filled with all data except that last Row -> Credits it's always showing NULL in the database.
This is part of my code:
public function getAllProducts()
{
$db = getDB();
$stmt = $db->prepare("SELECT * FROM products");
$stmt->bindParam("pid", $pid, PDO::PARAM_INT) ;
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_OBJ);
$db=null;
return $data;
}
public function getProduct($pid)
{
$db = getDB();
$stmt = $db->prepare("SELECT * FROM products WHERE pid=:pid");
$stmt->bindParam("pid", $pid, PDO::PARAM_INT) ;
$stmt->execute();
$data = $stmt->fetch(PDO::FETCH_OBJ);
$db=null;
return $data;
}
and this where I have a problem
public function orders()
{
$id = $_SESSION['session_id'];
$db = getDB();
$stmt = $db->prepare("SELECT P.product, P.price, P.product_img, P.currency, P.credits, O.created, O.oid FROM orders O, products P WHERE O.id_fk=:id AND P.pid = O.pid_fk ORDER BY O.created DESC");
$stmt->bindParam("id", $id, PDO::PARAM_INT) ;
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_OBJ);
$db=null;
return $data;
}
public function updateOrder($pid, $payerID, $paymentID, $token, $credits)
{
$id = $_SESSION['session_id'];
if($this->pyamentCheck($paymentID) < 1 && $id > 0){
$db = getDB();
$stmt = $db->prepare("INSERT INTO orders (id_fk, pid_fk, payerID, paymentID, token, created, credits) VALUES (:id, :pid, :payerID, :paymentID, :token, :created, :credits)");
$stmt->bindParam("paymentID", $paymentID, PDO::PARAM_STR) ;
$stmt->bindParam("payerID", $payerID, PDO::PARAM_STR) ;
$stmt->bindParam("token", $token, PDO::PARAM_STR) ;
$stmt->bindParam("pid", $pid, PDO::PARAM_INT) ;
$stmt->bindParam("id", $id, PDO::PARAM_INT) ;
$created = time();
$stmt->bindParam("created", $created, PDO::PARAM_INT) ;
$stmt->bindParam(":credits", $credits, PDO::PARAM_INT) ;
$stmt->execute();
$db=null;
return true;
}
else{
return false;
}
}
I can´t figure it out.

Answer 1

This is quite a frequent question so it deserves an answer, however obvious it may seem.
Once you have a working INSERT query and one of columns turns to be NULL, it means that the source variable contained NULL.
So the problem is neither with PDO, nor prepared statements, nor a database but simply with your source variable, $credits. You have to check your code related to this variable and make sure it does contain the desired value.