多文件上传、MVC依赖注入与服务容器

1. 多文件上传、封装成可复用的函数或类

运行截图：

// 多文件上传
function upload_muifile($name = 'files') {
    if (isset($_FILES[$name]) && $_FILES[$name]['error']) {
        foreach ($_FILES[$name]['error'] as $key => $error) {
            if ($error) {
                echo "<p style='color:red;'>" . upload_ero($error) . "</p>";
            } else {
                $filename = strstr($_FILES[$name]['name'][$key],'.',true);
                $ext = strstr($_FILES[$name]['name'][$key],'.');
                $path = 'uploads/' . md5($filename . 'hello') . $ext;
                if (move_uploaded_file($_FILES[$name]['tmp_name'][$key],$path)) {
                    echo "<p style='color:green;'>{$_FILES[$name]['name'][$key]},上传成功!</p>";
                    echo "<img src='{$path}' width='150'/>";
                }
            }
        }
    }
}
// 上传错误编码
function upload_ero(int $error = 0) : string
{
    switch ($error) {
        case 1:
            $msg = '超过单文件大小!';
            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 = '写入失败，请检查目标目录权限';
            break;
        default:
            exit('未定义错误!');
    }
    return $msg;
}
// 调用上传文件函数
upload_muifile($name = 'files');
?>
<!DOCTYPE html>
<html lang="en">
<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>多文件上传</title>
</head>
<body>
    <form action="" method="post" enctype="multipart/form-data">
    <fieldset>
        <legend>多文件上传</legend>
    <input type="hidden" name="MAX_FILE_SIZE" value="10485760">
        <input type="file" multiple name="files[]">
        <button>上传</button>
    </fieldset>
    </form>
</body>
</html>

—

2. MVC与依赖注入、服务容器对依赖对象的管理

控制器：Controller.php运行截图

模型:Model.php

namespace mvc_user;
use PDO;
// 模型类
class Model
{
    // 获取数据
    public function get_data()
    {
        $pdo = new PDO('mysql:dbname=phpedu','root','123456');
        $stmt = $pdo->prepare('select * from users limit 10');
        $stmt->execute();
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
}

视图:View.php

namespace mvc_user;
// 视图
class View
{
    // 数据显示
    public function fetch($data) 
    {
        $table = '<table border="1" cellspacing="0">';
        $table .= '<caption>用户信息表</caption>
        <tr bgcolor="lightyellow">
            <td>UID</td>
            <td>姓名</td>
            <td>性别</td>
            <td>工资</td>
            <td>邮箱</td>
            <td>生日</td>
        </tr>';
        foreach ($data as $user) {
            $table .= '<tr>';
            $table .= '<td>' . $user['sid'] . '</td>';
            $table .= '<td>' . $user['name'] . '</td>';
            $table .= '<td>' . $user['gender'] . '</td>';
            $table .= '<td>' . $user['salary'] . '</td>';
            $table .= '<td>' . $user['email'] . '</td>';
            $table .= '<td>' . $user['birthday'] . '</td>';
            $table .= '</tr>';
        }
        $table .= '</table>';
        return $table;
    }
}

控制器：Controller.php

namespace mvc_user;
use Closure;
require 'Model.php';
require 'View.php';
// 服务容器
class Cont1
{
    // 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],[]);
    }
}
// 将依赖的对象添加到容器中
$cont = new Cont1();
$cont->bind('model',function () {return new Model();});
$cont->bind('view',function () {return new view();});
class Controller4
{
    public function index(Cont1 $cont)
    {
        $data = $cont->make('model')->get_data();
        return $cont->make('view')->fetch($data);
    }
}
$controller = new Controller4();
echo $controller->index($cont);

1. 多文件上传、封装成可复用的函数或类

2. MVC与依赖注入、服务容器对依赖对象的管理

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