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多文件上传

通过遍历$_FILES里面的数组实现多文件上传
把上传文件的代码封装称一个函数

<?php
function upload_error($error)
{
    switch ($error) {
        case 1:
            $msg = '超过的单文件大小';
            break;
        case 2:
            $msg = '超过前端表单限制';
            break;
        case 3:
            $msg = '上传文件不完整';
            break;
        case 4:
            $msg = '没有文件被上传';
            break;
        case 6:
            $msg = '找不到临时目录';
            break;
        case 7:
            $msg = '写文失败，目录无写入权限';
            break;
        default:
            $msg = '未定义错误';
    }
    return $msg;
}
function upload($files){
    if(is_array($files)){
        foreach($files['error'] as $key=> $error){
            if($error === 0){
                $patch='uploads/'.md5(strstr($files['name'][$key],'.',true)).strstr($files['name'][$key],'.');
                if(move_uploaded_file($files['tmp_name'][$key],$patch)){
                    echo "<p> {$files['name'][$key]}上传成功</p>";
                    echo "<img src='{$patch}' width='150'>";
                }else{
                   echo upload_error($error);
                }
            }
        }
    }
}

前端页面

<!-- 多文件批量上传 -->
<?php
$files=$_FILES['files'];
include 'common.php';
echo upload($files);
?>
<!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>Document</title>
</head>
<body>
    <form action="" method="post" enctype="multipart/form-data">
        <fieldset>
            <legend>多文件上传</legend>
            <input type="file" name="files[]" multiple>
            <button>上传</button>
        </fieldset>
    </form>
</body>
</html>

效果图

mvc

M:model,模型，数据库的操作
v:view,视图，页面html
c：controller，控制器
模型
```php
<?php
namespace mvc;

use PDO;
class Model{
public function getData(){
$pdo=new PDO(‘mysql:dbname=php’,’root’,’123456’);
$stmt=$pdo->prepare(‘select * from user limit 10’);
$stmt->execute();
return $stmt->fetchAll(PDO::FETCH_ASSOC);
}
}

视图
```php
namespace mvc;
class View{
    public function fetch($data){
        $table='<table>';
        $table.=' <caption>员工列表</caption>
        <thead>
            <tr>
                <th>id</th>
                <th>姓名</th>
                <th>年龄</th>
                <th>性别</th>
                <th>邮箱</th>
                <th>生日</th>
                <th>入职日期</th>
                <th>操作</th>
            </tr>
           <tbody>';
           foreach ($data as $v){
               $table.='<tr>';
               $table.='<td>'. $v['id'].'</td>';
               $table.='<td>'. $v['name'].'</td>';
               $table.='<td>'. $v['age'].'</td>';
               $table.='<td>'. $v['gender'].'</td>';
               $table.='<td>'. $v['email'].'</td>';
               $table.='<td>'. $v['borthday'].'</td>';
               $table.='<td>'. $v['create_time'].'</td>';
               $table.='<td><button>编辑</button> <button>删除</button></td>';
               $table.='</tr>';
           }
           $table.='</tbody>';
           return $table;
    }
}

控制器

namespace mvc;
// 加载模型和视图
require 'model.php';
require 'view.php';
class Controller1{
    public function index(){
        $md=new Model();
        $data=$md->getData();
        $view=new View();
        return $view->fetch($data);
    }
}
// 客户端测试
// 创建控制器对象
$controller=new Controller1();
echo $controller->index();

效果图

依赖注入

解决对象之间的耦合

<?php
namespace mvc;
// 加载模型和视图
require 'model.php';
require 'view.php';
class Controller2{
    public function index($md,$view){
        $data=$md->getData();
        return $view->fetch($data);
    }
}
// 客户端测试
// 创建控制器对象
$controller=new Controller2();
$md=new Model();
$view=new View();
echo $controller->index($md,$view);

使用构造函数进行依赖注入

<?php
namespace mvc;
// 加载模型和视图
require 'model.php';
require 'view.php';
class Controller3
{
    private $model;
    private $view;
    public function __construct($model, $view)
    {
        $this->model = $model;
        $this->view = $view;
    }
    public function index()
    {
        $data = $this->model -> getData();
        return $this->view->fetch($data);
    }
}
// 客户端测试
// 创建控制器对象
$md = new Model();
$view = new View();
$controller = new Controller3($md, $view);
echo $controller->index();

容器

将外部依赖对象进行统一管理

namespace mvc;
use Closure;
// 加载模型和视图
require 'model.php';
require 'view.php';
// 服务容器
class Container{
    //对象容器
    protected $instances=[];
    // 添加对象
    public function bind($alias,Closure $process){
        $this->instances[$alias]=$process;
    }
    // 取出对象
    public function make($alias,$params=[]){
        return call_user_func_array($this->instances[$alias],[]);
    }
}
// 将依赖的外部对象添加到容器中
$container=new Container();
$container->bind('model',function(){return new Model();});
$container->bind('view',function(){return new View();});
class Controller4
{
    public function index(Container $container)
    {
        $data = $container->make('model')-> getData();
        return $container->make('view')->fetch($data);
    }
}
// 客户端测试
$controller = new Controller4();
echo $controller->index($container);

Correcting teacher：

天蓬老师

Correction status：qualified

Teacher's comments：

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