Assign the value to the Object in php - php

Question

Actually after fetching the data from the Database, i want to create a new Object and insert this object to the array but when i check the array it shows the NULL value
here is my code:
<?php
$query = "sql query";
$filter_Result = mysqli_query($con, $query);
$newOrders = Array();
while ($row = mysqli_fetch_array($filter_Result)) {
$order;
$orderId = $row['order_id']; //fetch row id
$temp = check_id($newOrders, $orderId);
if ($temp != null) {
$order = $temp;
} else {
echo " <br>";
$order = new Order($row['order_id'], $row['status'], $row['created_Date']);
$newOrders[] = $order;
}
$item = new Item($row['status'], $row['quantity']);
$order->AddItem($item, null);
}
function check_id($newOrders, $orderId) {
$length = count($newOrders);
for ($i = 0; $i < $length; $i++) {
if ($newOrders[$i]->$orderId == $orderId)
return $newOrders[$i];
}
return null;
}
foreach ($newOrders as $order) {
}
?>

Answer 1

You have a variable in your Order class
var $order_Id;
But then you try to assign value to $orderId which does not exist
$this->orderId = $orderId;
I would suggest turning all PHP errors on while developing. You can include this in your php code to see if you get any errors. It is very hard to see all the small errors with naked eye :) Let PHP do it for you.
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
More about error reporting here.

Answer 2

You have several small mistakes, e.g. using "this" incorrectly, using different name for "orderId", plus a wrong name for the constructors. The constructor name should be "Order" or "__construct", same for "Item" constructor.
class Order {
/* Member variables */
var $orderId;
var $status;
var $createdDate;
var $items = array();
function Order($orderId, $status, $createdDate)
{
$this->orderId = $orderId;
$this->status = $status;
$this->createdDate = $createdDate;
}
function AddItem($itemId,$quantity)
{
$item = new Item($itemId,$quantity);
$items[] = $item;
}
}
$c = new Order(1, 'OK', 'today');
print_r($c);

Answer 3

Now i found the Solution in the PHP we have to use __construct() for the creating a Constructor....
So use it __construct instead of class name for more info visit:
__construct() vs SameAsClassName() for constructor in PHP

Answer 4

new_order.php
<?php
class Order {
/* Member variables */
var $order_Id;
var $status;
var $createdDate;
var $items = array();
function __Order($order_Id, $status, $createdDate)
{
$this->order_Id = $order_Id;
$this->status = $status;
$this->createdDate = $createdDate;
}
function AddItem($itemId,$quantity)
{
$item = new Item($itemId,$quantity);
$items[] = $item;
}
}
class Item {
var $productId;
var $productName;
var $quantity;
var $personalization;
function __Item($productId, $quantity)
{
$this->productId = $productId;
$this->productName = $productName;
$this->quantity = $quantity;
$this->personalization = $personalization;
}
}
?>