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php灭绝手把手教你玩文件上传
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php灭绝手把手教你玩文件上传

  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>文件上传</title>
  8. </head>
  9. <body>
  10.     <form action="upload2.php" method="post" enctype="multipart/form-data">
  11.         <fieldset>
  12.             <legend>
  13.                 单文件上传
  14.             </legend>
  15.             <label for="my_file"></label>
  16.             <input type="file" name="my_file" id="my_file">
  17.             <button>上传</button>
  18.         </fieldset>
  19.     </form>
  20. </body>
  21. </html>
  1. <?php
  2. echo '<pre>';
  4. var_dump(uploadFile($_FILES['my_file']));
  8. function uploadFile($fileInfo,$uploadPath='./uploads',$flag=true,$allowExt=['jpg','png','wbmp','gif','jpeg','bmp'],$maxSize=2097152){
  9.     if($fileInfo['error'] == 0){
  10.         $arr = explode('.',$fileInfo['name']);//explode 分割字符串，以（.）点，分割
  11.         // var_dump($arr);
  12.         $ext = end($arr);              //取后缀
  13.         $prefix = array_shift($arr);   //取文件名
  14.         if(!in_array($ext,$allowExt)){//判断后缀是否存在
  15.             return $res = '文件类型不合法';
  16.         }
  18.         if($fileInfo['size'] > $maxSize){       //判断文件大小
  19.             return $res = '文件大小超过限制的最大值';
  20.         }
  22.         if(!getimageSize($fileInfo['tmp_name'])){//检测图片是否合法
  23.             return $res = '不是真实图片';
  24.         }
  26.         if(!is_uploaded_file($fileInfo['tmp_name'])){//检测上传方式是否为http post
  27.             return $res = '上传方式错误：请使用http post 方式上传';
  28.         }
  30.         // $uploadPath = 'uploads/';         //存储文件目录
  31.         if(!file_exists($uploadPath)){    //file_exists判断目录是否存在
  32.             mkdir($uploadPath,0770,true); //mkdir创建目录，参数0770为权限
  33.             chmod($uploadPath,0770);      //为以防万一，再次修改权限为0770
  34.         }
  35.         // move_uploaded_file,copy 函数都可以移动文件
  36.         // echo $prefix.time(); //调试用
  37.         $des = $uploadPath.'/'.md5($prefix.time()).'.'.$ext; //将散列后的文件名，与后缀拼接。($prefix.time()拼接为原文件名+时间戳，md5 在将其散列形成独一无二的文件名，避免用户上传相同文件名的文件导致出现问题)
  38.         // echo $des;//调试用
  39.         $moveResult = move_uploaded_file($fileInfo['tmp_name'],$des);//参数：将$fileInfo['tmp_name']临时文件，复制到$des，
  40.         if(!$moveResult){
  41.             $res['error'] = '文件移动失败';
  42.         }else{
  43.             $res['info'] = $fileInfo['name'] . '上传成功';
  44.             $res['fileRealPath'] = $des;
  45.         }
  46.         return $res;
  47.     }else{
  48.         switch($fileInfo['error']):
  49.             case 1:
  50.                 echo '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值';
  51.                 break;
  52.             case 2:
  53.                 echo '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值';
  54.                 break;
  55.             case 3:
  56.                 echo '文件只有部分被上传';
  57.                 break;
  58.             case 4:
  59.                 echo '没有文件被上传。 是指表单的file域没有内容，是空字符串';
  60.                 break;
  61.             case 6:
  62.                 echo '找不到临时文件夹';
  63.                 break;
  64.             default:
  65.                 echo '系统错误';
  66.         endswitch;
  67.     }
  68. }
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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