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文件上传的实例
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前端

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>Document</title>
  8. </head>
  9. <body>
  10.     <form action="userUpload.php" method="post" enctype="multipart/form-data"> 
  11.         单文件上传<input type="file" name="pic" id="">
  12.         <input type="submit" value="上传">
  13.     </form>
  16.     <form action="userUpload.php" method="post" enctype="multipart/form-data"> 
  17.         多文件上传<input type="file" name="pic[]" multiple id="">
  18.         <input type="submit" value="上传">
  19.     </form>
  20. </body>
  21. </html>
  1. <?php
  2. // 文件上传类
  3. /**
  4.  * 1 判断上传过程中是否有错误
  5.  * 2 验证上传文件的类型是否符合要求
  6.  * 3 验证上传文件的大小是否符合要求
  7.  * 4 判断上传路径和上传成功后要保存的文件名新名称
  8.  * 5 将图片从垃圾目录中移除
  9.  * 注意：
  10.  * 如果是单文件上传$_FILES['表单名称']则是一个一维数组
  11.  * 如果是多文件上传$_FILES['表单名称']则是一个二维数组，数组中name对应着每个上传文件的名称
  12.  */
  14.  class Upload{
  15.      //成员属性
  16.      //将是检测上传过程的数组变量
  17.      public $file;
  18.      public $pic;
  19.      public $path;
  20.      public $size;
  21.      public $type;
  22.      public $newImg;
  23.      public $pathInfo = array();
  24.      //成员方法
  25.      //构造方法  初始化成员属性值
  26.      function __construct($pic,$path='./upload',$size = 5000000,array $type = array('image/jpeg','image/jpg','image/gif','image/png')){
  27.          //初始化赋值
  28.          $this->pic = $pic;
  29.          $this->file= $_FILES[$pic];
  30.          $this->path= $path;
  31.          $this->size =$size;
  32.          $this->type  = $type;
  33.      }
  35.      //需要一个方法可以在外部调用进行上传文件操作
  36.      public function do_upload($mutiple = false){
  37.          if($mutiple === false){
  38.              //用户使用单文件上传方式
  39.              return $this->myExec();
  40.          }else{
  41.              $return = [];
  42.              //用户使用多文件上传方式
  43.              foreach($_FILES[$this->pic]['name'] as $k=>$v){
  44.                 $this->file['name'] = $v;
  45.                 $this->file['type'] = $_FILES[$this->pic]['type'][$k];
  46.                 $this->file['error'] = $_FILES[$this->pic]['error'][$k];
  47.                 $this->file['tmp_name'] = $_FILES[$this->pic]['tmp_name'][$k];
  48.                 $this->file['size'] = $_FILES[$this->pic]['size'][$k];
  49.                 $return[]= $this->myExec();
  50.             }
  51.             return $return;
  53.          }
  54.      }
  55.      //6 制作一个方法将文件上传的过程调用执行
  56.      private function myExec(){
  57.          //需要将文件上传的5步都执行一次判断是否成功
  58.          if($this->fileError() !==true){
  59.              return $this->fileError();
  60.          }elseif($this->patternType() !== true){
  61.              return $this->patterType();
  62.          }elseif($this->patternSize() !== true){
  63.              return $this->patternSize();
  64.          }elseif($this->reNameImage() !== true){
  65.              return $this->reNameImage();
  66.          }elseif($this->moveImg() !== true){
  67.              return $this->moveImg();
  68.          }else{
  69.              return $this->moveImg();
  70.          }
  72.      }
  73.     // 1 判断上传过程中是否有错误
  74.      private function fileError(){
  75.         //错误判断
  76.         if($this->file['error']){
  77.             switch($this->file['error']>0){
  78.                 case 1:
  79.                     return '超出PHP.INI 配置文件中的upload_max_filesize设置的值';
  80.                 case 2:
  81.                     return '超过了HTML表单中设置的max_file_size的值';
  82.                 case 3:
  83.                     return '只有部分文件被上传';
  84.                 case 4:
  85.                     return '没有文件上传';
  86.                 case 6:
  87.                     return '找不到临时目录';
  88.                 case 7:
  89.                     return '写入失败';
  91.             }
  92.         }
  93.         return true;
  94.      }
  95.     //2 验证上传文件的类型是否符合要求
  96.      private function patternType(){
  97.          if(!in_array($this->file['type'],$this->type)){
  98.              return '类型不合法';
  99.          }
  100.         return true;
  101.      }
  102.     // 3 验证上传文件的大小是否符合要求
  103.     private function patternSize(){
  104.         if($this->file['size']>$this->size){
  105.             return '上传文件大小超过了预设的'.$this->size.'byte大小';
  106.         }
  107.         return true;
  108.     }
  109.     // 4 判断上传路径和上传成功后要保存的文件名新名称
  110.     private function reNameImage(){
  111.         //创建保存目录，可能会遇到upload/pic/nihao/
  112.        if(!file_exists($this->path)){
  113.         mkdir($this->path,0777,true);
  114.        }
  115.         //获取图片后缀名
  116.         $suffix = strrchr($this->file['name'],'.');
  117.         //判断名称是否重复
  118.         do{
  119.             //制作新名称
  120.             $this->newImg = md5(time().mt_rand(1,1000).uniqid()).$suffix;
  121.         }while(file_exists($this->path.$this->newImg));
  122.         return true;
  123.     }
  125.     // 5 将图片从垃圾目录中移除
  126.     private function moveImg(){
  127.         if(move_uploaded_file($this->file['tmp_name'],$this->path.$this->newImg)){
  128.             $this->pathInfo['pathInfo']= $this->path.$this->newImg;
  129.             $this->pathInfo['name']= $this->newImg;
  130.             $this->pathInfo['path'] = $this->path;
  131.             return $this->pathInfo;
  132.         }else{
  133.             return '未知错误，请重新上传';
  134.         }
  135.     }
  136. }
  137. ?>
  1. <?php
  2. //包含上传类，创建上传文件对象
  3. echo '<pre>';
  4. var_dump($_FILES);
  5. include './upload.php';
  6. $upload = new Upload('pic');
  7. $res=$upload->do_upload(true);
  8. var_dump($res);
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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