自己手写一个简易的MVC框架

mvc结构分为: m(model) - v(view) - c(controller).
其中m和v可用第三方包实现,而c这需要自己实现(原因: c是业务逻辑实现区,充满了不确定性).
m用到的第三方库为: catfan/medoo
v用到的第三方库为: league/plates

具体实现步骤步骤

创建一个项目目录testFrame在此目录下分别创建application和core目录
安装第三方包
1. 安装catfan/medoo: composer require catfan/medoo
2. 安装league/plates: composer require league/plates
3. 最终目录结构

在core目录中新建Model和View脚本并在其中导入第三方包

Model.php的代码:

<?php
namespace core;
use Medoo\Medoo;
class Model extends Medoo
{
 public function __construct(array $options) 
 { 
     parent::__construct($options); 
 }
}

View.php的代码:

<?php
namespace core;
use League\Plates\Engine;
class View extends Engine
{
 public function __construct($directory = null, $fileExtension = 'php') { parent::__construct($directory, $fileExtension); }
}

3.最终目录

在application目录下创建三个目录,分别是models, views, controllers

在models目录下新建StaffsModel.php,获取员工表的数据.
在views目录下新建staffs目录,创建显示员工数据的视图list.php(html).
在controllers目录下创建StaffsController.php,把员工数据(StaffsModel)插入到视图(StaffsView)中.

具体代码:

StaffsController.php
```phpt
<?php

  namespace controllers;
  use Closure;
  // 服务容器
  class Container
  {
  protected $instanles;
      // 插入外部依赖
      public function bind($alias, Closure $process)
      {
          $this->instanles[$alias] = $process;
      }
      // 取出外部依赖
      public function make($alias, $params = []):object
      {
          return call_user_func_array($this->instanles[$alias], $params);
      }
  }
  // 门面
  class Facade
  {
  protected static $container = null;
      // 构造函数,初始化$container
      public static function initialize(Container $container)
      {
          static::$container = $container;
      }
  }
  // 静态化模型类
  class StaticStaffModel extends Facade
  {
  public static function select($tablename, $field, $condition)
  {
  return static::$container->make('model')->select($tablename, $field, $condition);
  }
  }
  // 静态化视图类
  class StaticStaffView extends Facade
  {
  public static function fetch($path, $data)
  {
  return static::$container->make('view')->render($path, ['staffs' => $data]);
  }
  }
  // 控制器
  class StaffController
  {
  public function __construct(Container $container)
  {
  Facade::initialize($container);
  }
      public function index($tablename, $field, $condition, $path)
      {
          $data = StaticStaffModel::select($tablename, $field, $condition);
          return StaticStaffView::fetch($path, $data);
      }
  }

> StaffsModel.php
```phpt
<?php
     namespace models;
     use testFrame\core\Model;
     class StaffModel extends Model
     {
     public function __construct(array $options)
     {
     parent::__construct($options);
     }
}

staffs/list.php
```html

 <!DOCTYPE html>
 <html lang="en">
     <head>
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1.0">
         <title>员工信息</title>
         <style>
             body {
                 display: flex;
                 flex-direction: column;
                 align-items: center;
             }
             table {
                 border-collapse: collapse;
                 border: 1px solid;
                 width: 50%;
                 text-align: center;
             }
             th,
             td {
                 border: 1px solid;
                 padding: 5px;
             }
             tr:first-child {
                 background-color: #eee;
             }
         </style>
     </head>
     <body>
         <h3>用户管理系统</h3>
         <table>
             <tr>
                 <th>id</th>
                 <th>姓名</th>
                 <th>性别</th>
                 <th>工资</th>
                 <th>邮箱</th>
                 <th>操作</th>
             </tr>
             <?php foreach ($staffs as $staff): ?>
                 <tr>
                     <td><?= $this->e($staff['sid']) ?></td>
                     <td><?= $this->e($staff['name']) ?></td>
                     <td><?= $this->e($staff['gender']) == 'male' ? '男' : '女' ?></td>
                     <td><?= $this->e($staff['salary']) ?></td>
                     <td><?= $this->e($staff['email']) ?></td>
                     <td>
                         <button>编辑</button>
                         <button>删除</button>
                     </td>
                 </tr>
             <?php endforeach ?>
         </table>
         <p>
             <a href="">1</a>
             <a href="">2</a>
             <a href="">3</a>
             <a href="">4</a>
             <a href="">5</a>
             <a href="">6</a>
         </p>
     </body>
 </html>

5. 在`composer.json`中添加*autoload*,然后在控制台执行`composer dump`.注意,控制台路径要在当前目录下.
```json5
{
    "name": "zhang/null",
    "description": "this is a test",
    "require": {
        "catfan/medoo": "^1.7",
        "league/plates": "^3.4"
    },
    "autoload": {
        "classmap": [
            "application/controllers",
            "application/models",
            "application/views",
            "core"
        ]
    }
}

测试,在根目录下创建一个index.php进行测试,具体代码如下:

<?php
use testFrame\core\View;
use models\StaffModel;
use controllers\Container;
use controllers\StaffController;
require_once './vendor/autoload.php';
$container = new Container();
$container->bind('view', function () { return new View('application/views'); });
$container->bind(
    'model', function () {
    $config = [
        'database_type' => 'mysql',
        'database_name' => 'phpedu',
        'server'        => 'localhost',
        'username'      => 'admin',
        'password'      => '123456',
    ];
    return new StaffModel($config);
}
);
$controller = new StaffController($container);
echo $controller->index('staffs', ['sid', 'name', 'age', 'gender', 'salary', 'birthday'], ['LIMIT' => [20, 10]], 'staffs/list');

效果:
)

PHP: 一个迷你的MVC小框架

自己手写一个简易的MVC框架

具体实现步骤步骤

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