Php 从模型codeigniter获得不同的结果数组

我在使用Codeigniter作为web api方面是新手，我想得到这个结果

{"result":[{"id":"1","nama":"Orion","nomor":"08576666762"},{"id":"2","nama":"Mars","nomor":"08576666770"},{"id":"7","nama":"Alpha","nomor":"08576666765"}],"success":"1","message":"success"} 

但我却得到了这样的结果：

{"result":[[{"id":"1","nama":"Orion","nomor":"08576666762"},{"id":"2","nama":"Mars","nomor":"08576666770"},{"id":"7","nama":"Alpha","nomor":"08576666765"}]],"success":"1","message":"success"}

我不知道我哪里弄错了

我正在使用codeigniter，下面的代码来自控制器和模型

m_server.php（modals）

删除此行（可选）

换一条线

$result['result'] = $data->result(); //result become the array

array\u push
向现有数组添加元素

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

class Rest_server extends CI_Controller {

    function __construct(){
        parent::__construct();
        $this->load->model('m_server');
    }

    public function index()
    {
        $this->load->helper('url');

        $this->load->view('rest_server');
    }

    function dash_main1(){

        $data=$this->m_server->dash_main1();
        echo json_encode($data);

    }
}


$result['result'] = array();

$result['result'] = $data->result(); //result become the array