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PHP文件上传实战案例和MVC依赖注入和服务容器
李东亚¹⁸⁰³⁹⁵⁴⁰¹²⁰
Original
1156 people have browsed it

一、PHP文件上传实战

(一).文件上传知识相关点：

1.预定义变量：$_FILES-包含文件上传的所有信息（name,type,tmp_name,error,size）

  • name:上传文件的名字
  • type:上传文件的格式集
  • tmp_name:上传后的文件临时储存位置
  • error:上传文件的错误信息
  1. 0：文件上传成功
  2. 1：上传文件超过限制大小
  3. 2：上传文件超过表单限制大小
  4. 3：上传文件不完整
  5. 4：没有文件上传
  6. 5：未定义
  7. 6：找不到临时文件
  8. 7：写入失败，目录没有写入权限
  • size:文件的尺寸，用字节表示

2.函数：

  • move_uploaded_file('临时文件',"新文件"):将上传文件移动到新的位置；临时文件和新文件都有完整的路径和文件名字
  • is_uploaded_file("文件名字"):一般用来判断临时文件是否是由上传生成的；
  • strstr($str,'分割符');获取分隔符以后的所有字符（包含分隔符）；如果由第三个参数为true时，获取分割符以前的所有字符（不包含分隔符）;

(二)文件实战案例

1.代码
1.1处理上传文件

  1. <?php
  3. //定义上传文件类
  4. class UpLoad{
  6.     // private $files=array();
  8.     public function __construct($files){
  9.         // $this->files=$files;
  10.         $this->upload($files);
  11.     }
  12.     private function showerror(int $num):string
  13.     {
  14.         switch($num){
  15.             case 1:
  16.                 $msg= "超过文件大小限制";
  17.                 break;
  18.             case 2:
  19.                 $msg= "超过表单限制";
  20.                 break;
  21.             case 3:
  22.                 $msg= "文件上传不完整";
  23.                 break;
  24.             case 4:
  25.                 $msg= "没有文件上传";
  26.                 break;
  27.             case 6:
  28.                 $msg= "找不到临时文件";
  29.                 break;
  30.             case 7:
  31.                 $msg= "写入失败，目标目录没有权限";
  32.                 break;
  33.             default:
  34.                 $msg= "未知错误";  
  35.         }
  36.         return $msg;
  37.     }
  38.     private function upload($files){
  39.         $files=$files["files"];
  40.     // var_dump($files["error"]);
  41.         if($files["error"]){
  42.             foreach($files["error"] as $key=>$error){
  43.                 if($error===0){
  44.                     if(is_uploaded_file($files["tmp_name"][$key])){
  45.                         $ext=strstr($files["name"][$key],".");
  46.                         $filename=strstr($files["name"][$key],".",true);
  47.                         $newname=$filename.time().$ext;
  48.                         move_uploaded_file($files["tmp_name"][$key],$newname);
  49.                         echo "<img src='{$newname}' width=200;>";
  50.                         echo "<span>{$files["name"][$key]}上传成功</span>";
  52.                     }else{
  53.                         echo "非法操作";
  54.                     }
  56.                 }else{
  57.                     echo $this->showerror($error);
  58.                 }
  59.             }
  60.         }
  61.     }
  63. }

1.2上传文件

  1. <?php
  2.     //导入上传类
  3.     include "upload.php";
  4.     //调用上传类
  5.     new UpLoad($_FILES);
  6. ?>
  7. <!DOCTYPE html>
  8. <html lang="en">
  9. <head>
  10.     <meta charset="UTF-8">
  11.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  12.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  13.     <title>文件上传</title>
  14. </head>
  15. <body>
  16.     <form action="#" method="POST" enctype="multipart/form-data">
  17.         <input name="files[]" type="file" multiple>
  18.         <button>上传</button>
  19.     </form>
  20. </body>
  21. </html>

2.运行效果

二 MVC服务容器管理依赖注入

(一)相关知识点

1.需要资源类:Closure;
2.call_user_func_array(函数名,参数);:函数名如果时对象中方法
可以[对象名,函数名];参数是数组;
3.服务容器类时,把需要的类是实列化后保存到一组类中关联数组中,使用时从类关联数组中拿出来使用;

(二)实战案例

1.M类

  1. <?php
  3. class Model{
  4.     private $dsn="mysql:host=127.0.0.1;dbname=test;port=3306;charset=utf8mb4";
  5.     private $username="admin";
  6.     private $password="123456";
  7.     private $pdo;
  9.     public function __construct(){
  10.         $this->pdo=new \PDO($this->dsn,$this->username,$this->password);
  11.     }
  13.     public function select($n,$m){
  14.         $sql="select * from v_staffs limit ?,?";
  15.         $stmt=$this->pdo->prepare($sql);
  16.         $stmt->bindParam(1,$n,PDO::PARAM_INT);
  17.         $stmt->bindParam(2,$m,PDO::PARAM_INT);
  18.         $stmt->execute();
  19.         // $stmt->debugDumpParams();
  20.         return $res=$stmt->fetchAll(\PDO::FETCH_ASSOC);
  21.         // var_dump($res);
  23.     }
  26. }
  28. // echo (new Model())->select(0,5);

2.V类

  1. <?php
  3. // $index=include "index.php";
  4. class View
  5. {
  6.     public function index($data){
  7.         $html=<<<"EOT"
  8.         <table border="1" cellpadding='3' cellspacing='0'>
  9.         <caption>员工信息表</caption>
  10.         <tr>
  11.             <th>编号</th>
  12.             <th>姓名</th>
  13.             <th>年龄</th>
  14.             <th>性别</th>
  15.             <th>工资</th>
  16.             <th>邮箱</th>
  17.             <th>职位</th>
  18.             <th>负责区域</th>
  19.         </tr>
  20.         EOT;
  21.         $tr="";
  22.         foreach($data as $item){
  23.             // echo "<pre>".print_r($item,true);
  24.             $tr.="<tr><td>".$item["id"]."</td><td>".$item["name"]."</td><td>".$item["age"]."</td><td>".$item["gender"]."</td><td>".$item["salary"]."</td><td>".$item["email"]."</td><td>".$item["postion"]."</td><td>".$item["area"]."</td></tr>";
  26.         }
  27.         echo $html.$tr."</table>";
  28.     }
  29. }
  31. echo <<<EOT
  32. <style>
  34.     table {
  35.         width: 1000px;
  36.         margin: 10px auto;
  37.     }
  39.     #page {
  40.         margin-top: 10px;
  41.         width: 1000px;
  42.         display: flex;
  43.         justify-content: space-around;
  44.     }
  46.     th,
  47.     td {
  48.         text-align: center;
  49.     }
  50.     #page>.active {
  51.         background-color: green;
  52.         color:white;
  53.     }
  54. </style>
  55. EOT;

3.控制类

  1. <?php
  2. //容器
  3. // use Closure;
  5. class Container{
  7.     protected $container=[];
  9.     public function bind($name,Closure $class){
  10.         $this->container[$name]=$class;
  11.     }
  13.     public function make($name,$params=[]){
  14.         return call_user_func_array($this->container[$name],$params);
  15.     }
  17. }
  19. class Controls{
  20.     public function show(Container $name){
  22.         // var_dump($name);
  23.         // var_dump($name->make("Model"));
  25.         $data=$name->make("Model")->select(0,10);
  27.         // var_dump($data);
  29.         $name->make("View")->index($data);
  30.     }
  31. }
  33. include "Model.php";
  34. include "View.php";
  36. $container=new Container();
  38. $container->bind("Model",function(){return new Model();});
  39. $container->bind("View",function(){return new View();});
  41. (new Controls())->show($container);

4.运行效果

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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