慕课网 微信小程序商城构建全栈应用 tp5【总结】

1.异常处理：

【代码越抽象，复用性越高】

【封装性越好，适应代码变化的能力越强】

【】

<?php
/**
 * Created by PhpStorm.
 * User: 14155
 * Date: 2018/12/22
 * Time: 23:40
 */

namespace app\lib\exception;


use think\Exception;
use think\exception\Handle;
use think\Request;

class ExceptionHandler extends Handle
{
    private $code;
    private $msg;
    private $errorCode;

    //需要返回客户端当前的Url
    public function render(\Exception $e)
    {
        if ($e instanceof BaseException) {
            //  如果是自定义的消息
            $this->code = $e->code;
            $this->msg = $e->msg;
            $this->errorCode = $e->errorCode;
        } else {
            $this->code = 500;
            $this->msg = '服务器内部错误';
            $this->errorCode = 999;
        }
        $request = Request::instance();
        $result = [
            'msg' => $this->msg,
            'error_code' => $this->errorCode,
            'request_url' => $request->url()
        ];
        return json($result, $this->code);
    }
}

【】

<?php
/**
 * Created by PhpStorm.
 * User: 14155
 * Date: 2018/11/10
 * Time: 0:31
 */

namespace app\lib\exception;


use think\Exception;

class BaseException extends Exception
{
    //  HTTP 状态码    404，200
    public $code = 400;

    //  错误具体信息（英文）
    public $msg = 'Parameter error';

    //  自定义的错误码
    public $errorCode = 10000;

}

【】

<?php
/**
 * Created by PhpStorm.
 * User: 14155
 * Date: 2018/12/22
 * Time: 23:44
 */

namespace app\lib\exception;


class BannerMissException extends BaseException
{
    public $code = 404;
    //请求的banner不存在;
    public $msg = 'The request Banner does not exist';
    public $errorCode = 40000;
}

【】