MVC框架
Model:模型类，数据库操作
View:视图类，展示到客户端
Controller:控制器,协调模型与视图
MVC目录架构：
- 具体代码如下：
- Model.php
namespace core;
use PDO;
abstract class Model
{
protected $db;
public function __construct($dsn,$username,$password)
{
$this->db = new PDO($dsn,$username,$password);
}
public function getAll($num)
{
$sql = "SELECT * FROM `bittel` LIMIT ?;";
$stmt = $this->db->prepare($sql);
$stmt->bindParam(1,$num,PDO::PARAM_INT);
if($stmt->execute()){
return $stmt->fetchAll(PDO::FETCH_ASSOC);
}else{
print_r($stmt->errorInfo());
print_r($stmt->debugDumpParams());
}
}
}- View.php
namespace core;
class View
{
//1.创建模板变量
protected array $data = [];
//2.模板赋值
public function assign(string $key, $value)
{
$this->data[$key] = $value;
}
//3.模板渲染
public function render($path, $data = [])
{
//判断是否有数据传入
if ($data) {
foreach ($data as $key => $value) {
$this->assign($key, $value);
}
}
//数组解构
extract($this->data);
file_exists($path) ? include $path : die('模板文件不存在');
}
}- Controller.php
namespace core;
abstract class Controller
{
//模型对象
protected Model $model;
//视图对象
protected View $view;
public function __construct($model,$view)
{
//初始化两个对象
$this->view = $view;
$this->model = $model;
}
}- Router
namespace core;
//路由类
class Router
{
public static function parse(){
// 默认控制器,实际项目,应该来自配置文件,而不是在写死
$controller = 'User';
$action = 'user';
// 参数列表
$params = [];
// 判断是否存在pathinfo
if (array_key_exists('PATH_INFO', $_SERVER) && $_SERVER['PATH_INFO'] !== '/') {
// 为什么要判断 $_SERVER['PATH_INFO'] !== '/' ?
// 因为: admin.php/ 时,$_SERVER['PATH_INFO'] = '/', 导致解析控制器失败
$pathinfo = array_filter(explode('/', $_SERVER['PATH_INFO']));
// dump($pathinfo);
// 考虑到index.php/ 情况, 这时pathinfo为空数组
if (count($pathinfo) >= 2) {
$controller = array_shift($pathinfo);
$action = array_shift($pathinfo);
$params = $pathinfo;
} else {
$controller = array_shift($pathinfo);
}
}
// 查看控制器,方法,参数
// dump($controller, $action, $params);
// 将这些数据返回出去
return [$controller, $action, $params];
}
}- 自定义模型 UserModel.php
use core\Model;
class UserModel extends Model
{
public function __construct($dsn, $username, $password)
{
parent::__construct($dsn, $username, $password);
}
}- 自定义控制器 UserController.php
use core\Model;
class UserModel extends Model
{
public function __construct($dsn, $username, $password)
{
parent::__construct($dsn, $username, $password);
}
}- view文件 user.php
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>分页展示数据</title>
<style>
table {
margin: auto;
width: 600px;
border-collapse: collapse;
text-align: center;
}
table th,
table td {
border: 1px solid;
padding: 5px;
}
table thead {
background-color: lightcyan;
}
table caption {
font-size: larger;
margin-bottom: 8px;
}
body>p {
display: flex;
}
p>a {
text-decoration: none;
color: #555;
border: 1px solid;
padding: 5px 10px;
margin: 10px 2px;
}
.active {
background-color: seagreen;
color: white;
border: 1px solid seagreen;
}
</style>
</head>
<body>
<table>
<caption><h3>用户信息表</h3></caption>
<thead>
<tr>
<th>ID</th>
<th>姓名</th>
<th>性别</th>
<th>邮箱</th>
</tr>
</thead>
<tbody>
<?php foreach ($users as $user) :extract($user) ?>
<tr>
<td><?=$id?>
</td>
<td><?=$name?>
</td>
<td><?=$sex?'女':'男' ?>
</td>
<td><?=$email?>
</td>
</tr>
<?php endforeach ?>
</tbody>
</table>
</body>
</html>- 入口文件 1.index.php
namespace Mvc;
use controller\UserController;
use model\UserModel;
use core\View;
// 入口文件: 测试
// 1.类的自动 composer的自动加载器
require 'vendor/autoload.php';
// 2. 实例化控制器
$model = new UserModel('mysql:dbname=bittel', 'root', 'root');
//print_r($model);
//echo $model;
$view = new View();
$users = new UserController($model, $view);
// 3. 调用控制器中的方法
$users->getDate(10);- 入口文件 2. index1.php
namespace Mvc;
use core\Router;
use core\View;
use Model\UserModel;
require 'vendor/autoload.php';
require 'model/UserModel.php';
$request = Router::parse();
$controller = array_shift($request);
$method = array_shift($request);
$params = array_shift($request);
// 生成控制器名称
$controller= 'controller\\'. ucfirst($controller). 'Controller';
//echo $controller;
//die();
$model = new UserModel('mysql:dbname=bittel', 'root', 'root');
//print_r($model);
//echo $model;
$view = new View();
$users = new $controller($model, $view);
call_user_func_array([$users, 'getDate'], $params);- 效果如下：
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