Fetching part of SQL query for a WHILE loop on php - php

Question

Trying to fetch part of the query for a while loop.
I have an INNER JOIN sql query using four tables.
On the first while i'm fetching the orders AKA mod_orders
On the second loop i'm trying to fetch the order products with the information from the other tables AKA mod_orders_pords (pords intended).
so my first while needs to use only SELECT * FROM mod_orders
and the second while needs to loop the rest without the grouping part.
The question is: how do i run the second while?
SELECT * FROM mod_orders AS mo
INNER JOIN mod_orders_pords AS mop
ON mo.`id` = mop.`order_id`
INNER JOIN mod_products_list AS mpl
ON mop.`prod_id` = mpl.`id`
INNER JOIN mod_products AS mp
ON mpl.`id` = mp.`page_id`
GROUP BY mop.`order_id`
ORDER BY mo.`id` DESC

Answer 1

The question is not clear and doesn't specify the issue. I think you need to group all orders with product and product info.
First it is better to avoid * specially if you will access the row using the field name as all tables have id field.
You have order -> orderProduct -> product, so you need to sort by order_id then product id.
Then you will create one while loop and start building your array of objects, see sample code as example.
<?php
//I assume the you have result object using your sql query
$order = new stdClass();
$data = array(); //this array will contains all orders
$order->id = null;
while($row = $result->fetch_assoc()){
if(is_null($order->id) || $order->id != $row['order_id'])
{
//this means that we need to create new order->object
$order = new stdClass();
$order->$row['order_id'];
// add more data like order value etc..
$order->products = array();
$data[] = &$order; //add order by refrence
unset($product);
$product = new stdClass();
$product->id =null;
}
if(is_null($product->id) || $product->id != $row['product_id']){
unset($product);
$product = new stdClass();
$product->id = $row['product_id'];
// add more data like product name etc..
$order->products[] = &$product;
}
}
// unset all objects
unset($order, $product);
using this code you can achieve what you need but remember to sort by order, so first sort by order_id then sort by product_id. order by order_id, product_id. If you have third level added to the order by statement and no need to use group by is this case.