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多文件上传、MVC依赖注入与服务容器
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1. 多文件上传、封装成可复用的函数或类

  • 运行截图：

  1. // 多文件上传
  2. function upload_muifile($name = 'files') {
  3.     if (isset($_FILES[$name]) && $_FILES[$name]['error']) {
  4.         foreach ($_FILES[$name]['error'] as $key => $error) {
  5.             if ($error) {
  6.                 echo "<p style='color:red;'>" . upload_ero($error) . "</p>";
  7.             } else {
  8.                 $filename = strstr($_FILES[$name]['name'][$key],'.',true);
  9.                 $ext = strstr($_FILES[$name]['name'][$key],'.');
  10.                 $path = 'uploads/' . md5($filename . 'hello') . $ext;
  11.                 if (move_uploaded_file($_FILES[$name]['tmp_name'][$key],$path)) {
  12.                     echo "<p style='color:green;'>{$_FILES[$name]['name'][$key]},上传成功!</p>";
  13.                     echo "<img src='{$path}' width='150'/>";
  14.                 }
  15.             }
  16.         }
  17.     }
  18. }
  20. // 上传错误编码
  21. function upload_ero(int $error = 0) : string
  22. {
  23.     switch ($error) {
  24.         case 1:
  25.             $msg = '超过单文件大小!';
  26.             break;
  27.         case 2:
  28.             $msg = '超过前端表单限制';
  29.             break;
  30.         case 3:
  31.             $msg = '上传文件不完整';
  32.             break;
  33.         case 4:
  34.             $msg = '没有文件被上传';
  35.             break;
  36.         case 6:
  37.             $msg = '找不到临时目录';
  38.             break;
  39.         case 7:
  40.             $msg = '写入失败，请检查目标目录权限';
  41.             break;
  42.         default:
  43.             exit('未定义错误!');
  44.     }
  45.     return $msg;
  46. }
  47. // 调用上传文件函数
  48. upload_muifile($name = 'files');
  49. ?>
  51. <!DOCTYPE html>
  52. <html lang="en">
  53. <head>
  54.     <meta charset="UTF-8">
  55.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  56.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  57.     <title>多文件上传</title>
  58. </head>
  59. <body>
  60.     <form action="" method="post" enctype="multipart/form-data">
  61.     <fieldset>
  62.         <legend>多文件上传</legend>
  63.     <input type="hidden" name="MAX_FILE_SIZE" value="10485760">
  64.         <input type="file" multiple name="files[]">
  65.         <button>上传</button>
  66.     </fieldset>
  68.     </form>
  69. </body>
  70. </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
  1. namespace mvc_user;
  3. use PDO;
  5. // 模型类
  6. class Model
  7. {
  8.     // 获取数据
  9.     public function get_data()
  10.     {
  11.         $pdo = new PDO('mysql:dbname=phpedu','root','123456');
  12.         $stmt = $pdo->prepare('select * from users limit 10');
  13.         $stmt->execute();
  14.         return $stmt->fetchAll(PDO::FETCH_ASSOC);
  15.     }
  16. }
  • 视图:View.php
  1. namespace mvc_user;
  3. // 视图
  4. class View
  5. {
  6.     // 数据显示
  7.     public function fetch($data) 
  8.     {
  9.         $table = '<table border="1" cellspacing="0">';
  10.         $table .= '<caption>用户信息表</caption>
  11.         <tr bgcolor="lightyellow">
  12.             <td>UID</td>
  13.             <td>姓名</td>
  14.             <td>性别</td>
  15.             <td>工资</td>
  16.             <td>邮箱</td>
  17.             <td>生日</td>
  18.         </tr>';
  19.         foreach ($data as $user) {
  20.             $table .= '<tr>';
  21.             $table .= '<td>' . $user['sid'] . '</td>';
  22.             $table .= '<td>' . $user['name'] . '</td>';
  23.             $table .= '<td>' . $user['gender'] . '</td>';
  24.             $table .= '<td>' . $user['salary'] . '</td>';
  25.             $table .= '<td>' . $user['email'] . '</td>';
  26.             $table .= '<td>' . $user['birthday'] . '</td>';
  27.             $table .= '</tr>';
  28.         }
  29.         $table .= '</table>';
  30.         return $table;
  31.     }
  33. }
  • 控制器：Controller.php
  1. namespace mvc_user;
  3. use Closure;
  5. require 'Model.php';
  6. require 'View.php';
  8. // 服务容器
  9. class Cont1
  10. {
  11.     // 对象容器
  12.     protected $instances = [];
  14.     // 添加对象
  15.     public function bind($alias,Closure $process)
  16.     {
  17.         $this->instances[$alias] = $process;
  18.     }
  20.     // 取出对象
  21.     public function make($alias,$params=[]){
  22.         return call_user_func_array($this->instances[$alias],[]);
  23.     }
  24. }
  26. // 将依赖的对象添加到容器中
  27. $cont = new Cont1();
  28. $cont->bind('model',function () {return new Model();});
  29. $cont->bind('view',function () {return new view();});
  31. class Controller4
  32. {
  33.     public function index(Cont1 $cont)
  34.     {
  35.         $data = $cont->make('model')->get_data();
  36.         return $cont->make('view')->fetch($data);
  37.     }
  38. }
  40. $controller = new Controller4();
  41. echo $controller->index($cont);
Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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