Get data from one to many relation as array

Question

I have 2 tables with one-to-many relationship. I would like to get the data from the table with many as an array.

The 2 tables look like this:

    Users
_____________
| id | name |
|____|______|
| 1  | John |
|____|______|

    Posts
________________________
| id | title | user_id |
|____|_______|_________|
| 1  | post1 |    1    |
|____|_______|_________|
| 2  | post2 |    1    |
|____|_______|_________|

I can get the posts for each user using:

$sql = "SELECT u.id, u.name, p.title, p.id as post_id FROM users u JOIN posts p ON u.id = p.user_id WHERE u.id = :id";

This would return the following data:

_________________________________
| id |   name  | title | post_id |
|____|_________|_______|_________|
| 1  |   John  | post1 |    1    |
|____|_________|_______|_________|
| 1  |   John  | post2 |    2    |
|____|_________|_______|_________|  

The id and name are duplicated with each row and I don't need this data, So I want to get the posts data as array on 1 row like:

________________________
| id |   name  | posts |
|____|_________|_______|
| 1  |   John  | array |
|____|_________|_______|  

Result would be something like:

Array ( 
    [0] => Array (
        [id] => 1
        [name] => John 
        [posts] =>  Array (
            [0] => Array (
                [title] => post1
                [post_id] => 1
            )
            [1]=> Array (
                [title] => post2
                [post_id] => 2
            )     
        )
     ) 
) 

Is that possible with SQL or I need to handle the data with PHP to look like this result?

Answer 1

Forming such Php array could be tricky. But json objects are quite similar.

 create table Users ( id int primary key auto_increment, name varchar(30) ); create table Posts ( id int primary key auto_increment, title varchar(30), user_id int ); insert into Users (name) values ('John'); insert into Posts (title, user_id) values ('Post 1', 1), ('Post 2', 1);

 SELECT u.id, u.name , group_concat(JSON_OBJECT('title', p.title, 'post_id', p.id) order by p.id separator ',') as posts FROM Users u JOIN Posts p ON u.id = p.user_id GROUP BY u.id, u.name

\nid | name | posts                                                              \n-: |  :--- |  :------------------------------------------------------------------ \n 1 |  John | {"title": "Post 1", "post_id": 1},{"title": "Post 2", "post_id": 2} \n

db<>fiddle here