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php上传函数封装
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PHP文件上传函数封装

作业标题：PHP文件上传函数封装
作业内容：根据需求封装文件上传限制函数: 1. 文件大小不超过5M 2. 后缀只能是[‘jpg’,’jpeg’,’png’,’wbmp’,’gif’] 3. 检查图片合法性 4.为每一张图片处理散列名称 5. 目标目录不存在,创建目录 6.设置错误日志接收系统错误,而不是将错误显示到页面上

  • 首页demo1.php代码

    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.   <!-- application/x-www-urlencoded 不合适二进制数据或者包含ASCII字符的传输 -->
    11.   <form action="upload3.php" method="post" enctype="multipart/form-data">
    12.       <!-- <fieldset>
    13.           <legend>
    14.               单文件上传
    15.           </legend>
    16.           <label for="my_file"></label>
    17.           <input type="file" name="my_file" id="my_file">
    18.           <button>上传</button>
    19.       </fieldset>  -->
    21.       <fieldset>
    22.           <legend>
    23.               多文件上传
    24.           </legend>
    25.           <label for="my_file"></label>
    26.           <input type="file" name="my_file[]" id="my_file" multiple>
    27.           <button>上传</button>
    28.       </fieldset>
    29.   </form>
    30. </body>
    31. </html>
  • upload代码
  1. <?php
  2.  ini_set('display_errors','Off');        //页面不现实任何错误
  3.  ini_set('error_log','./error.log');  
  4. require 'common1.php';
  5. $files = upload($_FILES['my_file']);
  6. foreach ($files as $fileInfo)
  7. {
  8.     $res = uploadFile($fileInfo);
  10.     echo "<p>{$res['info']}</p>";
  11.     echo "<img style='border-radius:50%;width:100px';height:50% src='{$res['fileRealPath']}'>";
  12.     $uploadFiles[] = $res['fileRealPath'];
  14. }
  15. printf('<pre>%s</pre>',print_r($uploadFiles,true));
  16. echo json_encode($uploadFiles);
  • 封装函数common.php
  1. <?php
  2. ini_set('display_errors','Off');        //页面不现实任何错误
  3. ini_set('error_log','./error.log');  
  4. //文件上传函数
  5. function uploadFile($fileInfo,$uploadPath='./storage',$flag=true,$allowExt=['jpg','png','wbmp','gif','jpeg'],$maxSize=5242880)
  6. {
  7.     if($fileInfo['error'] == 0)
  8.     {
  9.         // 后端设置文件的类型
  10.         $arr = explode('.',$fileInfo['name']);
  11.         $ext = end($arr);
  12.         $prefix = array_shift($arr);
  13.         if(!in_array($ext,$allowExt))
  14.         {
  15.             $res['error']='非法的文件类型';
  16.         }
  18.         if($fileInfo['size'] > $maxSize)
  19.         {
  20.             $res['error']='文件大小超过限制的最大值';
  21.         }
  25.         if($flag)
  26.         {
  27.             //检测图片是否合法
  28.             if(!getimageSize($fileInfo['tmp_name']))
  29.             {
  30.                 $res['error']='不是真实图片,get out~';
  32.             }
  33.         }
  36.         if(!is_uploaded_file($fileInfo['tmp_name']))
  37.         {
  38.             $res['error'] ='上传方式错误:请使用http post方式上传';
  39.         }
  41.         if(!empty($res))  return;
  43.         // -----------------------------------------------------------------------
  45.         // copy(),move_uploaded_file()可以将文件从临时目录移动到指定路径
  47.         if(!file_exists($uploadPath))
  48.         {
  49.             mkdir($uploadPath,0770,true);
  50.             chmod($uploadPath,0770);
  51.         }
  53.         // 根据$prefix time() 生成唯一图片地址
  54.         $des = $uploadPath.'/'.md5($prefix.time()).'.'.$ext;
  55.         $result = move_uploaded_file($fileInfo['tmp_name'],$des);
  56.         if(!$result)
  57.         {
  58.             $res['error'] = '文件移动失败';
  59.         }else{
  60.             $res['info'] = $fileInfo['name'] . '上传成功';
  61.             $res['fileRealPath'] =  $des;
  62.         }
  64.         return $res;
  65.     }else{
  66.         switch($error) :
  67.             case 1:
  68.               $res['error'] = '文件超过`php.ini`中`upload_max_filesize`值<br>';
  69.             break;
  70.             case 2:
  71.                 $res['error'] =  '文件大小超过表单中`MAX_FILE_SIZE`指定的值<br>';
  72.             break;
  73.             case 3:
  74.                 $res['error'] = '文件只有部分被上传<br>';
  75.             break;
  76.             case 4:
  77.                 $res['error'] = '没有文件被上传<br>';
  78.             break;
  79.             case 6:
  80.                 $res['error'] =  '找不到临时文件夹<br>';
  81.             break;
  82.             case 6:
  83.                 $res['error'] =  '文件写入失败<br>';
  84.             break;
  85.             default:
  86.                 $res['error'] = '系统错误<br>';
  87.             break;
  88.         endswitch;
  89.         return $res;
  90.     }
  91. }
  94. function upload($fileInfo)
  95. {
  96.     foreach($fileInfo as $k=>$v)
  97.     {
  98.         foreach($v as $kk=>$vv)
  99.         {
  100.             if($kk == $kk )
  101.             {
  102.                 $files[$kk][$k]  = $vv;
  103.             }
  104.         }
  105.     }
  107.     return $files;
  108. }
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：在作业内容后面添上实例结果会更加完美
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