实现一个迷你的MVC小框架

实现一个迷你的mvc

1 安装第三方数据库框架medoo
composer require catfan/medoo
2 安装第三方php模板引擎plates
composer require league/plates
3 创建框架核心目录core

4 创建框架模型类Model.php，使用构造函数连接数据库

<?php
namespace core;
use Medoo\Medoo;
class Model extends Medoo{
  public function __construct()
  {
      parent::__construct(
          [
              'database_type'=>'mysql',
              'database_name'=>'php',
              'server'=>'localhost',
              'username'=>'root',
              'password'=>'123456',
          ]
          );
  }
}

5 创建框架视图类View.php

<?php
namespace core;
use League\Plates\Engine;
class View extends Engine{
  public $templates;
  public function __construct($path)
  {
      $this->templates=parent::__construct($path);
  }
}

6 创建mvc目录 app/controllers,app/models,app/views

7 创建自定义模型类UserModel.php

<?php
namespace models;
use core\Model;
//自定义模型类通常与一张数据表绑定，继承自框架核心模型类
class UserModel extends Model{
  public function __construct()
  {
      parent::__construct();
  }
}

8 创建控制器UserController.php

<?php
namespace controllers;
class UserController{
  public $model;
  public $view;
  public function __construct($model,$view)
  {
      $this->model=$model;
      $this->view=$view;
  }
  public function index()
  {
      return __METHOD__;
  }
  public function select()
  {
      //获取数据
     $user= $this->model->select('user',['id','name','gender','age','email','borthday','create_time']);
     //模板赋值
     return $this->view->render('users/list',['users'=>$user]);
  }
}

9 创建视图users/list.php

<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
      .active{
          color: green;
      }
      a{
          text-decoration: none;
          color: #000;
      }
  </style>
</head>
<body>
  <table>
      <caption>员工列表</caption>
      <thead>
          <tr>
              <th>id</th>
              <th>姓名</th>
              <th>年龄</th>
              <th>性别</th>
              <th>邮箱</th>
              <th>生日</th>
              <th>入职日期</th>
              <th>操作</th>
          </tr>
         <tbody>
         <?php foreach($users as $v): ?>
              <tr>
                  <td><?= $v['id'] ?></td>
                  <td><?= $v['name'] ?></td>
                  <td><?= $v['age'] ?></td>
                  <td><?= $v['gender'] ?></td>
                  <td><?= $v['email'] ?></td>
                  <td><?= $v['borthday'] ?></td>
                  <td><?= $v['create_time'] ?></td>
                  <td><button>编辑</button> <button>删除</button></td>
              </tr>
              <?php endforeach?>
         </tbody>
      </thead>
  </table>
  <p>
  </p>
</body>
</html>

10 配置composer.json文件 autoload psr-4自动映射

{
  "name": "wang/php.cn",
  "description": "this is a test",
  "require": {
      "catfan/medoo": "^1.7",
      "league/plates": "^3.4"
  },
  "autoload": {
      "psr-4": {
          "models\\": "app/models",
          "views\\": "app/views",
          "controllers\\": "app/controllers",
          "core\\": "core"
      }
  }
}

11 使用compser -dump命令更新映射
12 创建入口文件index.php
```
<?php
//入口文件

use controllers\UserController;
use core\View;
use models\UserModel;
require DIR.’/vendor/autoload.php’;
//模型
$model=new UserModel();
//视图
$view=new View(‘app/views’);
//控制器
$controller=new UserController($model,$view);
echo $controller->select();
```
浏览器访问入口文件index.php

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