从api返回多个order_id的值

I have an api function where I use Multiple order id if the order is from Multiple restaurant. This is the response I am getting.

["00000303", "00000304"]

Here is my code which returns value in Json

    $new_order_ids[] = $order_id;
                    if(isset($order_id))
                    {
                        $order_id = intval($order_id);
                        $order_id++;
                    }
                    else
                    {
                        $order_id = 1;
                    }

                    $order_id = str_pad($order_id, 8, '0', STR_PAD_LEFT);
    $r_data['order_id'] = $new_order_ids;
$json['order_id'] = $order_info['order_id'];

From above code, i get this result ["00000303", "00000304"].

and in java, I use this below line of code to get the response.

if(response.has("order_id"))
order_id = response.getString("order_id");

This gives me ["00000303", "00000304"]

How can i have order_id like "00000303"?

Java code

JSONArray orders=response.order_id;
String orderId;
for(int i=0; i<orders.length(); i++){
    orderId = orders.getString(i);
    // do whatever with the orderId
}

PHP code

function () { 
    $order_ids = array();
    array_push($order_ids, 'order id 1');
    array_push($order_ids, 'order id 2');

    return json_encode({'order_id', $order_id});
}

Update:

Remember to handle JSONException when parsing the JSON response in android

try {
    JSONArray orders=response.order_id;
    String orderId;
    for(int i=0; i<orders.length(); i++){
        orderId = orders.getString(i);
        // do whatever with the orderId
    }
}
catch(JSONException err) {
    err.printStackTrace();
}

try this

try {

    JSONArray orderArray=new JSONArray(response);
    for (int i = 0; i < orderArray.length(); i++) {
        String orderId=orderArray.getInt(i);
        Log.e("orderId", i+"="+orderId);
    }
 } catch (JSONException e) {
    e.printStackTrace();
}