I have this array 

```
$data = [ 'admin'=>'1', 'natasha'=>'2', 'demo3'=>'3' ]; 

```

When I output it `echo json_encode($data);` I get `{"admin":"1","natasha":"2","demo3":"3"}` and this how I need it and it works well!

Now I'm trying to loop data from database like this:

```
    $data = array();
    foreach(TopicModel::theListofUsers($topic_cat,30) as $row) {                
       $data[]= array($row->user_name=>$row->user_id);  
    }
    header('Content-Type: application/json');
    echo json_encode($data);

```

But I'm getting this format `[{"demo4":"4"},{"demo3":"3"}]` but I need **`{"admin":"1","natasha":"2","demo3":"3"}`** 

I tried many things, pass strings and convert to array or manipulate array but none of it gave me the proper format. Any idea?