Foreach not displaying the Results - php

Question

Hi am using the following Query need to get the order_id and product_id from this query ,
well when I run the query in phpmyadmin results are displayed.
global $wpdb;
$sql = "SELECT oi.order_id, p.ID as product_id, p.post_title, p.post_author as seller_id,
oim2.meta_value as order_total, terms.name as order_status
FROM {$wpdb->prefix}woocommerce_order_items oi
LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta oim ON oim.order_item_id = oi.order_item_id
LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta oim2 ON oim2.order_item_id = oi.order_item_id
LEFT JOIN $wpdb->posts p ON oim.meta_value = p.ID
LEFT JOIN {$wpdb->term_relationships} rel ON oi.order_id = rel.object_id
LEFT JOIN {$wpdb->term_taxonomy} tax ON rel.term_taxonomy_id = tax.term_taxonomy_id
LEFT JOIN {$wpdb->terms} terms ON tax.term_id = terms.term_id
WHERE
oim.meta_key = '_product_id' AND
oim2.meta_key = '_line_total'
GROUP BY oi.order_id";
$orders = $wpdb->get_results( $sql );
if ( $orders ) {
foreach ($orders as $order) {
$result=customFunction(**$order->order_id,$order->product_id,$order->seller_id**);
}
the problem is $order->order_id and $order->product_id value is not getting passed to the function but only $order->seller_id is getting passed. But in phpmyadmin the values are present for all the three variables.
tried
echo $orders[product_id] ;
echo $orders[order_id] ;
echo $orders[seller_id];
Hut only echo $orders[seller_id]; shows the value.
Here is the array structure:
Array (
[0] => stdClass Object (
[order_id] => 2774
[product_id] => 2531
[post_title] => Klassic Koalas Mug
[seller_id] => 3
[order_total] => 12
[order_status] => cancelled
)
[1] => stdClass Object (
[order_id] => 2869
[product_id] => 2622
[post_title] => Mug, Aqua
[seller_id] => 1
[order_total] => 1
[order_status] => on-hold
)

Answer 1

I'll put this in a comment but I don't have enough reputation. Do:
var_dump($orders)
and see what's inside. Maybe they are fetched as 'oi.order_id'.

Answer 2

Unsure about product_id, but it seems that order_id is not showing up because you are not setting and alias for order_id. So take this:
SELECT oi.order_id,
And change it to this
SELECT oi.order_id as order_id,
Past that do a dump of $orders to see the overall structure like this:
echo '<pre>';
print_r($orders);
echo '</pre>';

Answer 3

Lets debug this first, var_dump is your friend! try :
$orders = $wpdb->get_results( $sql );
var_dump($orders); die();
Now, after adding the var_dump, check the result, if order_id and product_id still don't have result, might be there is a DB issue? Then you have to fix your DB first.