PHP 利用composer写一个小框架

学习总结

使用第三方包可以加快项目的开发进度
使用composer可以快速搭建项目框架

1.目录结构

2.composer.json文件内容


{
  "autoload": {
    "psr-4": {
      "controllers\\": "app/controllers",
      "models\\": "app/models",
      "views\\": "app/views",
      "core\\": "core"
    }
  },
  "require": {
    "catfan/medoo": "^1.7",
    "league/plates": "^3.3",
    "nikic/fast-route": "^1.3"
  }
}

3.1GoodsController.php 控制器


<?php
namespace controllers;//命名空间是包名称
class GoodsController//类名必须与文件名一致
{
    public function index()
    {
        echo $this->select();//显示/views/goods/show.php
    }
    public $model;
    public $view;
    public function __construct($model,$view)
    {
        $this->model = $model;
        $this->view = $view;
    }
    public function select()
    {
        //使用后台medoo框架获取数据
        $records = $this->model->select('tb_goods','*',['LIMIT'=>10]);
        //把medoo获取的数据返回到/views/goods/show.php
        return $this->view->render('goods/show', ['records' => $records]);
    }
}
?>

3.2GoodsModel.php商品模型类


<?php
namespace models;
use core\Model;
//商品模型继承core中的Model
class GoodsModel extends Model
{
    public function __construct()
    {
        parent::__construct();
    }
}
?>

3.3Model.php公共模型类


<?php
namespace models;
use core\Model;
//商品模型继承core中的Model
class GoodsModel extends Model
{
    public function __construct()
    {
        parent::__construct();
    }
}
?>

3.4View.php公共视图类


<?php
namespace core;
use League\Plates\Engine;
//core中的View继承plates中的Engine
class View extends Engine
{
    protected $templeate;
    public function __construct($path)
    {
        $this->templeate = parent::__construct($path);
    }
}
?>

3.5 show.php数据显示页面


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>商品展示页</title>
    <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>
</head>
<body>
    <div class="show">
        <h2>商品展示页面</h2>
        <div><span>编号</span><span>名称</span><span>价格</span><span>时间</span></div>
        <?php foreach($records as $record):?>
        <div>
            <!-- 通过GoodsController控制器中的select()方法返回的数据，可直接使用 -->
            <span><?= $this->e($record['id']) ?></span>
            <span><?= $this->e($record['name']) ?></span>
            <span><?= $this->e($record['price']) ?>\<?= $this->e($record['unit']) ?></span>
            <span><?= $this->e($record['sdate']) ?></span>
        </div>
        <?php endforeach;?>
    </div>
</body>
</html>

3.6 index.php首页


<?php
//自动加载三方控件和自已写的类，在根目录中的composer.json中的autoload字段包含自已的类
require 'vendor/autoload.php';
use controllers\GoodsController;
use core\View;
use models\GoodsModel;
//GoodsModel继承自core中的Model,core中的Model继承自medoo三方控件
$model = new GoodsModel();
//View类来自core中的View类，core中的View类继承自plates中的Engine三方控件
$view = new View('app/views');
//创建一个控件器对象，传入模型和视图对象
$controller = new GoodsController($model,$view);
//调用控制器的index方法，显示页面内容
$controller->index();
?>

3.7 页面效果展示

4 Composer命令上机效果

安装medoo后端模板

安装plates前端模板

如果想自动加载自已写的类，必须在composer.json中添加autoload字段，然后用dump命令载入

学习总结

1.目录结构

2.composer.json文件内容

3.1GoodsController.php 控制器

3.2GoodsModel.php商品模型类

3.3Model.php公共模型类

3.4View.php公共视图类

3.5 show.php数据显示页面

3.6 index.php首页

3.7 页面效果展示

4 Composer命令上机效果

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