Getting an array as a field from result row - php

Question

I'm pretty new to databases, so my question is:
Let's say that we have two tables: Users and Orders
Is it possible (and how do I do it) to list all users with their data (First & Last name, birthdate etc) and associated orders in one query? So the result should look something like this:
|------------------------------|
| John Doe | Order 1 details |
| | Order 2 details |
| | Order 3 details |
|------------------------------|
| Janny Hoe | Order x details |
| | Order y details |
|------------------------------|
So you got the point? Each row from table1 has a field which contains multiple rows from table2? I've heard MySQL doesn't return multidimensional arrays, so how does it return something like this?
Any help would be greatly appreciated!
EDIT:
Table structure could be something like this:
TABLE users:
id | name
TABLE orders:
id | user_id | date_ordered | other unrelevant data...
I know this is doable with joins, but what bugs me is what will it return?
Will result have field orders which would be array containing orders row data like $result[0]['orders'][0]['date_ordered'] or something like that ?

Answer 1

Do a LEFT join (if there is a possibility that a user does not have any orders) and then gather the results in an array, based on the user ID:
SELECT Users.id, Users.name, Order.detail
FROM Users
LEFT JOIN Order
ON Users.id= Order.user;
Ex:
$userOrders = array();
$sql = 'SELECT Users.id, Users.name, Order.detail
FROM Users
LEFT JOIN Order
ON Users.id= Order.user';
foreach ($pdo->query($sql) as $row) {
$userOrders[$row['user_id']][] = $row;
}