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PHP多文件上传案和MVC简单案例以及MVC的依赖注入和服务容器的原理和实现过程
zl的php学习博客
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714 people have browsed it
  1. 写一个实现的多文件上传案例，并将它封装成一个可复用的函数或类 2. 实例演示MVC与依赖注入的原理，以及服务容器对依赖对象的管理的实现过程。。。。

1. 多文件上传案例

文件夹结构

  • upload.php
  • common.php
  • uploads

uplaod.php

  1. <?php
  2. printf('<pre>%s</pre>', print_r($_FILES, true));
  5. if (count($_FILES) > 0) {
  6.     include './common.php';
  7.     switch ($_GET['t']) {
  8.         case 'alone':
  9.             echo upload($_FILES['file']);
  10.             break;
  11.         case 'onebyone':
  12.             foreach ($_FILES as $file) {
  13.                 //                echo  $file['name'];
  14.                 echo upload($file);
  15.             }
  16.             break;
  17.         case 'multipart':
  18.             $files = [];
  19.             foreach ($_FILES['file']['error'] as $key => $value) {
  20.                 $files[] = [
  21.                     'name'     => $_FILES['file']['name'][$key],
  22.                     'type'     => $_FILES['file']['type'][$key],
  23.                     'tmp_name' => $_FILES['file']['tmp_name'][$key],
  24.                     'error'    => $_FILES['file']['error'][$key],
  25.                     'size'     => $_FILES['file']['size'][$key],
  26.                 ];
  27.             }
  28.             foreach ($files as $file) {
  29.                 //                echo  $file['name'];
  30.                 echo upload($file);
  31.             }
  32. //            var_dump($files);
  33.             break;
  34.         default:
  35.             echo '未知错误';
  36.     }
  37. }
  38. ?>
  40. <!DOCTYPE html>
  41. <html lang="en">
  42.     <head>
  43.         <meta charset="UTF-8">
  44.         <title>图片上传</title>
  45.         <style>
  46.             form {
  47.                 width: 20em;
  48.                 margin: 1em auto;
  49.             }
  50.             fieldset {
  51.                 margin: 1em;
  52.                 display: grid;
  53.                 place-content: flex-start;
  54.             }
  55.             button[type=button] {
  56.                 margin-bottom: .5em;
  57.             }
  58.         </style>
  59.     </head>
  60.     <body>
  61.         <form action="upload.php?t=alone" method="post" enctype="multipart/form-data">
  62.             <fieldset>
  63.                 <label>单文件上传</label>
  64.                 <input type="hidden" name="MAX_FILE_SIZE" value="10485760">
  65.                 <input type="file" name="file">
  66.                 <button>upload</button>
  67.             </fieldset>
  68.         </form>
  69.         <form action="upload.php?t=onebyone" method="post" enctype="multipart/form-data">
  70.             <fieldset>
  71.                 <label>多文件上传: 逐个上传</label>
  72.                 <input type="hidden" name="MAX_FILE_SIZE" value="10485760">
  73.                 <input type="file" name="file1">
  74.                 <button type="button" onclick="oneByOne()">继续添加文件</button>
  75.                 <button>upload</button>
  76.             </fieldset>
  77.         </form>
  78.         <form action="upload.php?t=multipart" method="post" enctype="multipart/form-data">
  79.             <fieldset>
  80.                 <label>多文件上传: 一次性上传</label>
  81.                 <input type="hidden" name="MAX_FILE_SIZE" value="10485760">
  82.                 <input type="file" name="file[]" multiple>
  83.                 <button>upload</button>
  84.             </fieldset>
  85.         </form>
  87.         <script>
  88.             let oneByOneFileNameIndex = 1;
  90.             // 动态添加逐个上传的input
  91.             function oneByOne() {
  92.                 const dom = document.querySelector(`input[name=file${oneByOneFileNameIndex}]`);
  93.                 const input = document.createElement('input');
  94.                 input.type = 'file'
  95.                 input.name = 'file' + ++oneByOneFileNameIndex;
  96.                 dom.insertAdjacentElement('afterend', input);
  97.             }
  98.         </script>
  99.     </body>
  100. </html>

common.php

  1. <?php
  3. /**
  4.  * 文件上传
  5.  *
  6.  * @param array $files: 一个文件的所有数据
  7.  * @return string
  8.  */
  9. function upload(array $files): string
  10. {
  11.     // 获取文件名
  12.     $name = $files['name'];
  13.     // 获取临时文件的路径
  14.     $tmpName = $files['tmp_name'];
  15.     // 获取错误信息
  16.     $error = $files['error'];
  18.     if ($error === 0) {
  19.         // 获取文件类型
  20.         $type = strstr($files['type'], '/', true);
  21.         // 获取文件后缀
  22.         $ext = '.' . strtolower(pathinfo($files['name'], PATHINFO_EXTENSION));
  24.         if ($type === 'image') {
  25.             $path = "uploads/" . md5($name . date('Ymd') . str_pad(mt_rand(1, 9999), 5, '0', STR_PAD_LEFT)) . $ext;
  26.             // 检测临时文件的合法性
  27.             if (is_uploaded_file($tmpName)) {
  28.                 // 移动文件
  29.                 if (move_uploaded_file($tmpName, $path)) {
  30.                     // 返回成功
  31.                     return "<span><p style=\"color:green\">{$name}上传成功</p><img src='{$path}' width=250  alt='{$name}' /></span>";
  32.                 } else {
  33.                     return '移动文件失败';
  34.                 }
  35.             } else {
  36.                 return '临时文件不合法';
  37.             }
  38.         } else {
  39.             return '上传类型错误';
  40.         }
  41.     } else {
  42.         return upload_error($error);
  43.     }
  44. }
  46. /**
  47.  * 文件上传的错误信息集合
  48.  *
  49.  * @param int $errno: error代码
  50.  * @return string
  51.  */
  52. function upload_error(int $errno): string
  53. {
  54.     switch ($errno) {
  55.         case 1:
  56.             $msg = '超过的单文件大小';
  57.             break;
  58.         case 2:
  59.             $msg = '超过前端表单限制';
  60.             break;
  61.         case 3:
  62.             $msg = '上传文件不完整';
  63.             break;
  64.         case 4:
  65.             $msg = '没有文件被上传';
  66.             break;
  67.         case 6:
  68.             $msg = '找不到临时目录';
  69.             break;
  70.         case 7:
  71.             $msg = '写入失败,目标目录无写入权限';
  72.             break;
  73.         default:
  74.             exit('未定义错误');
  75.     }
  76.     return $msg;
  77. }

2.

  1. MVC:
  2.     M-模型(数据库相关的操作),
  3.     V-视图(页面,html), 
  4.     C-控制器(功能:1.获取数据 2.选择视图)
  5. 依赖注入: 简单那来说就是为了解决对象之间的耦合(`在一个类中调用其他类的实例`),例2.1:
  6.     方法: 在类的外部实例化其他类, 然后以参数的方式传入.例:2.2:
  7. 服务容器: 将外部依赖(需要引用的外部类实例)进行统一的管理.例2.3

2.1

  1. <?php
  3. namespace test;
  5. require './Model.php';
  6. require './View.php';
  8. // 服务容器
  9. class Conn
  11. // 控制器
  12. class Controller
  13. {
  14.     public function index(): string
  15.     {
  16.         return (new View())->fetch((new \test\Model())->select()['data']);
  17.     }
  18. }

2.2

  1. <?php
  3. namespace test;
  5. require './Model.php';
  6. require './View.php';
  8. // 控制器
  9. class Controller
  10. {
  11. //    public function index(): string
  12. //    {
  13. //        return (new View())->fetch((new \test\Model())->select()['data']);
  14. //    }
  15.     protected $model;
  16.     protected $view;
  18.     public function __construct($model,$view) {
  19.         $this->model = $model;
  20.         $this->view = $view;
  21.     }
  23.     public function index(): string
  24.     {
  25.         return $this->view->fetch($this->model->select()['data']);
  26.     }
  27. }
  29. $model = new Model();
  30. $view = new View();
  32. $controller = new Controller($model, $view);
  33. echo $controller->index();

2.3

  1. <?php
  3. namespace test;
  5. require './Model.php';
  6. require './View.php';
  8. // 服务容器
  9. class Container
  10. {
  11.     // 对象容器
  12.     protected $instanles = [];
  14.     // 写入对象
  15.     public function bind($alias, \Closure $process)
  16.     {
  17.         $this->instanles[$alias] = $process;;
  18.     }
  20.     // 取出对象
  21.     public function make($alias, $params = [])
  22.     {
  23.         return call_user_func_array($this->instanles[$alias], $params);
  24.     }
  25. }
  27. // 控制器
  28. class Controller
  29. {
  30.     /*服务容器*/
  31.     public function index(Container $instanles)
  32.     {
  33.         return $instanles->make('view')->fetch($instanles->make('model')->select()['data']);
  34.     }
  35. }

3. MVC简单案例(数据来源: https://www.php.cn/blog/detail/26509.html)

文件夹结构

  • Model.php
  • View.php
  • Controller.php
  • index.php

Model.php

  1. <?php
  3. namespace mvc_demo;
  5. use PDO;
  7. // 模型类
  8. class Model
  9. {
  10.     // 获取数据
  11.     public function getData()
  12.     {
  13.         $pdo = new PDO('mysql:dbname=phpedu', 'root', 'root');
  14.         $stmt = $pdo->prepare('select * from staffs limit 10');
  15.         $stmt->execute();
  16.         return  $stmt->fetchAll(PDO::FETCH_ASSOC);
  17.     }
  18. }

View.php

  1. <?php
  3. namespace mvc_demo;
  5. // 视图
  6. class View
  7. {
  8.     // 数据展示
  9.     public function fetch($data)
  10.     {
  11.         $table = '<table border="1" cellspacing="0">';
  12.         $table .=    '<caption>员工信息表</caption>
  13.    <tr bgcolor="lightcyan">
  14.             <th>id</th>
  15.             <td>姓名</td>
  16.             <td>性别</td>
  17.             <td>工资</td>
  18.             <td>邮箱</td>
  19.             <td>生日</td>
  20.         </tr>';
  21.         foreach ($data as $staff) {
  22.             $table .= '<tr>';
  23.             $table .= '<td>' . $staff['sid'] . '</td>';
  24.             $table .= '<td>' . $staff['name'] . '</td>';
  25.             $table .= '<td>' . $staff['gender'] . '</td>';
  26.             $table .= '<td>' . $staff['salary'] . '</td>';
  27.             $table .= '<td>' . $staff['email'] . '</td>';
  28.             $table .= '<td>' . $staff['birthday'] . '</td>';
  29.             $table .= '</tr>';
  30.         }
  33.         $table .= '</table>';
  34.         return $table;
  35.     }
  36. }

Controller.php

  1. <?php
  3. namespace test;
  5. require './Model.php';
  6. require './View.php';
  8. // 服务容器
  9. class Container
  10. {
  11.     // 对象容器
  12.     protected $instanles = [];
  14.     // 写入对象
  15.     public function bind($alias, \Closure $process)
  16.     {
  17.         $this->instanles[$alias] = $process;;
  18.     }
  20.     // 取出对象
  21.     public function make($alias, $params = [])
  22.     {
  23.         return call_user_func_array($this->instanles[$alias], $params);
  24.     }
  25. }
  27. // 控制器
  28. class Controller
  29. {
  31.     //    public function index(): string
  32.     //    {
  33.     //        return (new View())->fetch((new \test\Model())->select()['data']);
  34.     //    }
  36.     /*依赖注入*/
  37.     //    protected $model;
  38.     //    protected $view;
  39.     //
  40.     //    public function __construct($model, $view)
  41.     //    {
  42.     //        $this->model = $model;
  43.     //        $this->view = $view;
  44.     //    }
  45.     //
  46.     //    public function index(): string
  47.     //    {
  48.     //        return $this->view->fetch($this->model->select()['data']);
  49.     //    }
  51.     /*服务容器*/
  52.     public function index(Container $instanles)
  53.     {
  54.         return $instanles->make('view')->fetch($instanles->make('model')->select()['data']);
  55.     }
  56. }

index.php

  1. <?php
  3. /*服务容器*/
  4. require './Controller.php';
  6. $container = new \test\Container();
  7. $container->bind('model', function (){return new \test\Model();});
  8. $container->bind('view', function (){return new \test\View();});
  10. $table = new \test\Controller();
  11. ?>
  13. <!DOCTYPE html>
  14. <html lang="en">
  15.     <head>
  16.         <meta charset="utf-8">
  17.         <title>mvc</title>
  18.     </head>
  19.     <body>
  20.         <?php echo $table->index($container);?>
  21.     </body>
  22. </html>
Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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