什么'错了我的选择查询模型PHP编码器 - what's wrong with my select query in model php codeigniter?

what's wrong with my select query in model php codeigniter?

下面是我的代码:

 function getValue($id)
  {
        $this->db->select('value');
        $this->db->where('id',$id);
        $q = $this->db->get('ref_table');
        $data = array_shift($q->result_array());
        $result = $data['value'];
        return $result;
  }

执行时出现错误数组转换为字符串

错误给出答案数组转换为字符串

试试这个模型中

 public function getValue($id)
  {
        $this->db->select('value');
        $this->db->where('id',$id);
        $q = $this->db->get('ref_table');
        $result = $q->result_array();
        return $result;
  }

在控制器

$data['value'] = $this->Model_name->getValue($id);
$this->load->view('my_view',$data)