php 中的MVC,服务容器，门面技术，路由解析

学习总结

• 使用MVC可以有效的把底层的数据库操作和前端的页面渲染分开
• 使用服务容器可以把模型和视图封装在服务容器中，减少对外部对象的依赖
• 门面技术，可以把模型和视图中的普通方法封装成静态方法，方便客户端调用
• 路由解析可以把url地址中的控制器，方法，参数进行有效解析

效果展示

1.模型类 Model.php

<?php
namespace nMVC
{
use PDO;
class Model
    {
        public function getData():array
        {
            $dbConn  = new \PDO('mysql:host=localhost;dbname=db_phpstudy','root','root');
            $res = $dbConn->query('SELECT * FROM `tb_goods` LIMIT 10')->fetchAll(\PDO::FETCH_ASSOC);
            return $res;
        }
    }
}
?>

2.视图类 View.php

<?php
namespace nMVC
{
    class View
    {
        public function showData($records)
        {
            echo '<style>
            * {
                padding: 0px;
                margin: 0px;
                box-sizing: border-box;
              }
              .show
              {
                  width: 600px;
                  height: 500px;
                  border: 1px solid #555;
                  margin-left: auto;
                  margin-right: auto;
                  margin-top:20px;
                  background-color: lightseagreen;
                  display: flex;
                  flex-flow: column nowrap;
                  justify-content: space-evenly;
                  align-items: center;
              }
              .show>div
              {
                    width: 100%;
                    border-bottom: 1px solid white;
                    display: flex;
                    flex-flow: row nowrap;
                    justify-content: space-evenly;
                    align-items: center;
               }
               .show>div:first-of-type
                {
                    font-size: larger;
                    font-weight: bolder;
                }
               .show>div>span
                {
                    text-align: center;
                }
               .show > div > span:nth-of-type(1) {
                    width: 50px;
                }
                .show > div > span:nth-of-type(2) {
                    width: 150px;
                }
                .show > div > span:nth-of-type(3) {
                    width: 150px;
                }
                .show > div > span:nth-of-type(4) {
                    width: 100px;
                }
            </style>';
            echo '<div class="show">';
            echo '<h2>商品信息展示</h2>';
            echo '<div><span>编号</span><span>名称</span><span>价格</span><span>时间</span></div>';
            foreach($records as $record)
            {
                echo '<div >';
                echo '<span>',"{$record['id']}",'</span>';
                echo '<span>',"{$record['name']}",'</span>';
                echo '<span>',"{$record['price']}\\{$record['unit']}",'</span>';
                echo '<span>',"{$record['sdate']}",'</span>';
                echo '</div>';
            }
            echo '</div>';
        }
    }
}
?>

3.服务容器类 Container.php

<?php
namespace nMVC
{
    require 'Model.php';
    require 'View.php';
    class Container
    {
        protected $case = [];
        public function bind($alias,\Closure $proce)
        {
            $this->case[$alias] = $proce; 
        }
        public function make($alias)
        {
           return call_user_func_array($this->case[$alias],[]);
        }
        public function delete($alias)
        {
            unset($this->case[$alias]);
        }
    }
}
?>

4.门面类 Facede.php

<?php
namespace nMVC
{
    require 'Container.php';
    class Facede
    {
        protected static $container = null;
        protected static $data = [];
        public static function init($container)
        {
            static::$container = $container;
        }
    }
    class Model1 extends Facede
    {
        public static function getdata()
        {
            static::$data = static::$container->make('model')->getdata(); 
        }
    }
    class View1 extends Facede
    {
        public static function showdata()
        {
            $records = static::$container->make('view')->showdata(static::$data);
            return $records;
        }
    }
}
?>

5.控制器类 Controller4.php

<?php
namespace nMVC
{
    require 'Facede.php';
    class Controller4
    {
        public function __construct(Container $container)
        {
            Facede::init($container);
        }
        public function index()
        {
            Model1::getdata();
            return View1::showdata();
        }
    }
    echo 'controller4 Facede 门面技术<br>';
    //创建一个服务容器的对象
    $container = new Container();
    //服务容器绑定数据
    $container->bind('model',function(){ return new Model; });
    $container->bind('view',function(){ return new View; });
    //创建一个控制器
    $controller4 = new Controller4($container);
    echo $controller4->index();
    //对象销毁
    $container->delete('model');
    $container->delete('view');
}
?>

6.路由解析Route.php

<?php
class GoodsController
{
    public function showdata($id,$name)
    {
        echo '商品编号：',$id,'<br>';
        echo '商品名称：',$name,'<br>';
    }
}
//http://localhost/php11/0514/Route.php/goods/showdata/id/1/name/%E7%99%BD%E8%8F%9C/sdate
//获取pathinfo信息
$pathInfoStr = $_SERVER['PATH_INFO'];
//过虑空数组元素，生成一个数组
$pathInfoArr = array_values(array_filter(explode('/',$pathInfoStr)));
//获取要访问的控制器
$controller =ucfirst(array_shift($pathInfoArr)) .'Controller';
//获取要访问的控制器的方法
$method = array_shift($pathInfoArr);
//获取参数
$paras = [];
for($i=0;$i<count($pathInfoArr);$i+=2):
    //如果参数没有值就不解析这个参数
    if(isset($pathInfoArr[$i+1])):
        $paras[$pathInfoArr[$i]] = $pathInfoArr[$i+1];
    endif;
endfor;
//动态生成一个控制器类，动态调用控制器类中的方法
$goods = new $controller();
$goods->$method(...array_values($paras));
?>

效果展示