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Composer自撸一个简单的MVC框架

1.创建MVC架构,视图层,模型层,控制器

2. 创建JSON文件

{
    "autoload": {
        "psr-4": {
            "controllers\\":"app/controllers",
            "models\\":"app/models",
            "views\\":"app/views",
            "core\\":"core"
        }
    },
    "require": {
        "catfan/medoo": "^2.1",
        "league/plates": "^3.4"
    }
}

3.通过Compoesr命令 `composer update`引入

4.引入第三方包:

通过第三方包提供的Composer命令,将第三方包引入

catfan/medoo模型包

medoo包内容

league/plates视图包

plates包内容

5.通过JOSN文件,加载Composer的自动加载机制

{
    "autoload": {
        "psr-4": {
            "controllers\\":"app/controllers",
            "models\\":"app/models",
            "views\\":"app/views",
            "core\\":"core"
        }
    },
    "require": {
        "catfan/medoo": "^2.1",
        "league/plates": "^3.4"
    }
}

6.创建自己的核心代码,Model,View去继承第三方包

自己的MODEL

自己的VIEW

入口文件

7.代码展示:

核心代码MODEL

<?php
namespace core;
use Medoo\Medoo;
//公共模型
class Model extends Medoo
{
    //构造方法
    public function __construct()
    {
        $option = [
        'database_type' => 'mysql',
        'database_name' => '16',
        'server' => 'localhost',
        'username' => 'root',
        'password' => 'root',
        ];
        parent::__construct($option);
    }
}

核心代码VIEW

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

MVC架构

视图层

<!DOCTYPE html>
<html lang="en">
<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>员工管理系统</title>
</head>
<body>
    <h3>员工表</h3>
    <table>
        <tr>
            <td>id</td>
            <td>姓名</td>
            <td>密码</td>
            <td>性别</td>
            <td>管理</td>
        </tr>
        <?php foreach($staffs as $staff): ?>
            <tr>
                <td><?= $this->e($staff['id']) ?></td>
                <td><?= $this->e($staff['uname']) ?></td>
                <td><?= $this->e($staff['pwd']) ?></td>
                <td><?= $this->e($staff['gender'])?></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>

模型层

<?php
namespace models;
use core\Model;
class StaffsModel extends Model
{
    public function index()
    {
        return 'OK';
    }
    public function __construct()
    {
        parent::__construct();
    }
}

控制器

<?php
//命名空间:包名称
namespace controllers;
use core\Model;
class StaffsController
{
    public $model;
    public $view;
    public function __construct($model,$view)
    {   
        $this->model = $model;
        $this->view = $view;
    }
    public function index()
    {
        return 'Hello php.cn';
    }
    public function display()
    {
        include 'app/views/staffs/list.php';
    }
    //查询
    public function select()
    {
       $staffs = $this->model->select('user',['id','uname','pwd','gender']
            ,['id[>=]'=>5,'LIMIT'=>10]
       );
       return $this->view->render('staffs/list',['staffs' =>$staffs]);
    }
}

入口文件

<?php
require 'vendor/autoload.php';
use controllers\StaffsController;
use core\View;
use models\StaffsModel;
// //控制器
// echo (new StaffsController)->index();
// echo '<hr>';
// //模型
// echo (new StaffsModel)->index();
// echo '<hr>';
// //视图
// echo (new StaffsController)->display();
//模型处理
$model = new StaffsModel();
// var_dump($model);
// echo '<hr>';
//视图
$view = new View('app/views');
// var_dump($view);
// echo '<hr>';
//查询
$controller = new StaffsController($model,$view);
// var_dump($controller);
echo $controller->select();