How to form Json array from sql pdo data in php?

The code that I have does not display what I need, tell me what I’m doing wrong

   $new_array =[];
  foreach($result as $row)
   {
    $array =[
        'id'=> $row["id"],
        'summ' => $row["summ"],
    ];
    foreach($array AS $key => $val) {
     $new_array[] = $val;
    }
   }
   echo json_encode($new_array);

Outputs the following result

["26","180","25","35","24","50","23","50","22","100"]

But I need the result to be different, and I can’t.
Here’s an example of how it should be:

[
{"26","180"},
{"25","35"},
{"24","50"},
{"23","50"},
{"22","100"}
]

Please tell me how to achieve this?

>Solution :

You can skip the inner loop:

$new_array = [];

foreach($result as $row)
{
    $new_array[] = [
        $row['id'],
        $row['summ']
    ];
}

echo json_encode($new_array);

That should give you the result:

[
    ["26","180"],
    ["25","35"],
    ...
]