MVC开发模式以及Smarty模板引擎的使用

发布时间：2020-12-25 10:29 所属栏目：53 来源：网络整理

导读：Linux 全局安装 composer 将目录切换到/usr/local/bin/ 目录 cd /usr/local/bin/ 在 bin 目录中下载 composer curl -sS https: // getcomposer.org/installer | php 通过 composer.phar - v 查看 composer修改为中国镜像 composer.phar config -g repo.packa

Linux 全局安装 composer

将目录切换到/usr/local/bin/目录
    cd /usr/local/bin/
在 bin 目录中下载 composer
    curl -sS https://getcomposer.org/installer | php
通过 composer.phar -v 查看 composer
修改为中国镜像
    composer.phar config -g repo.packagist composer https:packagist.phpcomposer.com
最后我把composer.phar复制了一份，重命名为composer
以后可以直接用composer

MVC架构模式
控制器（Controller）- 负责转发请求，对请求进行处理
视图（View） - 界面设计人员进行图形界面设计
模型（Model） - 程序员编写程序应有的功能（实现算法等等）、数据库专家进行数据管理和数据库设计(可以实现具体的功能)

实现简易模板引擎：

composer.json

    {
       自动加载
       可以在composer.json的autoload字段找那个添加自己的autoloader
      "autoload": {
        psr-4: {
          App\\Controllers\\": Controllers/,App\\Models\\Models/Tools\\Tools/
        }
      }
    }

Models/Users.php

    <?php
     model层数据库操作演示
    namespace App\Models;

    class Users
    {
         数据存入数据库演示
        public function store()
        {
            echo 'store into database';
        }

         查询数据库演示
         function getUsername()
        {
             查询数据库
            return test-data;
        }
    }

Controllers/UserController.php

    <? App\Controllers;

    use Tools\Tpl;
    use App\Models\Users;

     UserController extends Tpl
    {
         function create()
        {
            echo User create function getUser()
        {
             通过Model查询数据
            $userModel = new Users;
            $username = $userModel->getUsername();

             将$username显示在对应的一个HTML文件当中，并且显示出来
             表现层 user/user.html
             将变量发送给模板（html文件）
            $this->assign(usernameage',20);
             显示模板
            $this->display(user/user.html);
        }
    }

Views/user/user.html

    <!DOCTYPE html>
    <html lang=en">
    <head>
        <meta charset=UTF-8">
        <title>Title</title>
    </head>
    <body>
        <h2>
            {$username}
        </h2>
        <h3>
            {$age}
        </h3>
    </body>
    </html>

Tools/Tpl.php

    <? 分配变量
     将变量发送给模板
     Tools;

     Tpl
    {
        protected $assign_vars = [];

         function assign($tpl_var_name,$val)
        {
            $this->assign_vars[$tpl_var_name] = $val;
        }

         function display($tpl_name)
        {
             Views/user/$tpl_name
            $className = get_called_class();  App\Controllers\UserController
            $dirName = strtolower(substr(substr($className,1)">16),1)">0,-10));  user
            $dir = dirname(__DIR__) . /Views/' . $dirName . / . $tpl_name;
             file_get_contents
            $content = file_get_contents($dir);
             preg_replace
            foreach ($this->assign_vars as $tpl_var_name => $val) {
                $content = preg_replace(/\{\$' . $tpl_var_name . \}/<?php echo $this->assign_vars[""]; ?> compile
            $compile = dirname(__DIR__) . /runtime/Compile/' . md5($tpl_name) . .php;
            file_put_contents($compile,$content);
             include
            include $compile;
        }
    }

Smarty模板引擎的使用

服务端开发部分演示
Smarty引擎的安装
变量的分配和加载显示模板
以插件形式扩展Smarty
缓存控制技术

smarty.php

    <?/**
     * Created by PhpStorm.
     */
    session_start();
    require './libs/Smarty.class.php';

    $smarty =  Smarty();

     简单配置 初始化设置
    $smarty->setTemplateDir('./Views');
    $smarty->setCompileDir('./runtime/Compile'$smarty->setConfigDir('./Config'$smarty->addPluginsDir('./Plugins'$smarty->setCacheDir('./runtime/Cache');

    $smarty->caching = 1;开启缓存
    $smarty->setCacheLifetime(60*60*24$smarty->left_delimiter = '{';
    $smarty->right_delimiter = '}';

     缓存机制
    if (!$smarty->isCached('extends.html',1)">$_SERVER['REQUEST_URI'])) {

         数据库查询
        $data = [[]];

         使用 
        $smarty->assign([
            'username' => 'test-data','age' => 20
        ]);

         数组
        $smarty->assign('arr1',[1,2,3]);
        $smarty->assign('arr2',['id' => 1,'username' => 'zhangsan','age' => 30$smarty->assign('users', [
            ['id' => 1,'age' => 30],1)">
            ['id' => 2,'username' => 'lisi','age' => 40]
        ]);

        $smarty->assign('hobby_ids',1)">$smarty->assign('hobby_output',['看书','敲代码','看视频'$smarty->assign('options',1)"> [
            1 => '看书',2 => '敲代码',3 => '看视频' 注册function
        $smarty->registerPlugin('function','font',1)">function ($attributes) {
           $text = $attributes['text'];
           $color = $attributes['color'] ?? 'black';
           return '<span style="color: ' . $color . '">' . $text . '</span>';
        });

         注册变量修饰器
        $smarty->registerPlugin('modifier','link',1)">$text,1)">$href,1)">$isCapitalize = false$return = '<a href="' . $href . '">' . $text . '</a>'if ($isCapitalize) {
               return ucwords($return);
           }
           ;
        });
        
         注册块状函数
        $smarty->registerPlugin('block',1)">$attributes,1)">$text$href = $attributes['href'];
           if (!is_null()) {
               return '<a href="' . ;
           }
        });

         对象
        $smarty->assign('obj',1)">$smarty);

        $smarty->assign('text','This is a paragraph!'$smarty->display('smarty.html');
        $smarty->display('loop.html'$smarty->display('single_tag_func.html'$smarty->display('modifier.html'$smarty->display('block_func.html'$smarty->display('plugins.html'$data);
    }
    $smarty->clearCache('extends.html',1)">]);
    clearAllCache();
    $smarty->display('extends.html',1)">$_SERVER['REQUEST_URI']);

前端开发部分演示

（编辑：ASP站长网）