Add more value affter json endcode

$response = array(
    "aaData" => $data

);

echo json_encode($response);

how to add more name = ‘123’, data = $data

>Solution :

You can push data into the array or you can define the array and assign value by key
Example

   $response = [];
   $response['name'] = '123';
   $response['data'] = 'mydata';
   $response['aaData'] = $data;

   echo json_decode($response);

$data can be array like this

   $data =[];
   $data['name'] = "ABCD";
   $data['id'] = 1;
   $response['aaData'] = $data;