1.例子：

if ($codeid = $model->addCustomer($this->admin["id"])) {            $data["code"] = 10000;            $data["message"] = "添加客户成功。客户编号为:{
   $codeid}";            $data["data"] = 0;            $this->ajaxReturn($data);        } else {            $data["code"] = 10001;            $data["message"] = $model->failAddCustomer();            $data["data"] = 0;            $this->ajaxReturn($data);        }

2.返回数据：$data

3.接收数据。例如：

$.ajax({                    type : "POST",                    url : "
     ",                    dataType : "JSON",                    data : data,                    success : function(eve)                    {                        alert(eve.message);                        if (eve.code == 10000)                        {                            window.location.reload();                        }                    }                });