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单文件上传、多文件上传、批量上传
昔年
Original
743 people have browsed it

文件上传

1.单文件上传

  1. <?php
  2. // $_FILES
  3. printf('<pre>%s</pre>', print_r($_FILES, true));
  4. //自定义异常类
  5. // 自定义上传异常类
  6. class UploadException extends Exception
  7. {
  8.     // 在异常子类中,可以访问并重写Exception中的四个属性,通过__toString()格式化异常输出信息
  9.     public function __toString()
  10.     {
  11.         return <<< UPLOAD
  12. <style>
  13. table {border-collapse: collapse;border:1px solid black;text-align: center;}
  14. td {border:1px solid black;padding: 5px;}
  15. tr:first-of-type {background-color:#eee;}
  16. tr:last-of-type td {color: coral;}
  17. </style>
  18. <table>
  19. <tr><td>代码</td><td>信息</td><td>文件</td><td>行号</td></tr>
  20. <tr><td>$this->code</td><td>$this->message</td><td>$this->file</td><td>$this->line</td></tr>
  21. </table>
  22. UPLOAD;
  23.     }
  24. }
  25. ///////////////////////////////////////
  26. try {
  27.     //上传出错的代码
  28.     $errorCode = $_FILES['my_pic']['error'];
  29.     if ($errorCode > UPLOAD_ERR_OK) {
  30.         switch ($errorCode) {
  31.             case UPLOAD_ERR_INI_SIZE:
  32.                 throw new UploadException('文件超过php.ini中upload_max_filesize选项限制值', 1);
  33.                 break;
  34.             case UPLOAD_ERR_FORM_SIZE:
  35.                 throw new UploadException('文件大小超过表单中`MAX_FILE_SIZE`指定的值', 2);
  36.                 break;
  37.             case UPLOAD_ERR_PARTIAL:
  38.                 throw new UploadException('文件只有部分被上', 3);
  39.                 break;
  40.             case UPLOAD_ERR_NO_FILE:
  41.                 throw new UploadException('没有文件上传', 4);
  42.                 break;
  43.             case UPLOAD_ERR_CANT_WRITE:
  44.                 throw new UploadException('找不到临时文件夹', 6);
  45.                 break;
  46.             case UPLOAD_ERR_CANT_WRITE:
  47.                 throw new UploadException('文件写入失败', 7);
  48.                 break;
  49.             default:
  50.                 throw new UploadException('未知类型错误', 8);
  51.                 break;
  52.         }
  53.     }
  54.     $fileType = $_FILES['my_pic']['type'];
  55.     // var_dump(strstr($fileType, '/', true));
  56.     if (isset($fileType) && strstr($fileType, '/', true) !== 'image') throw new UploadException('文件类型错误', 9);
  57.     //将文件从临时目录移动到用户自定义的目标目录中
  58.     $tmpFileName = $_FILES['my_pic']['tmp_name'];
  59.     if (is_uploaded_file($tmpFileName)) {
  60.         //获取原始文件名
  61.         $originalFileName = $_FILES['my_pic']['name'];
  62.         //生成目标文件名
  63.         $destFileName = 'uploads/' . md5(mt_rand(1, 1000) . time()) . strstr($originalFileName, '.');
  64.         if (move_uploaded_file($tmpFileName, $destFileName)) {
  65.             echo "<p>$originalFileName:文件上传成功~~</p>";
  66.             echo "<img src='{$destFileName}' width='200'>";
  67.         }
  68.     }
  69. } catch (UploadException $e) {
  70.     echo $e;
  71. }
  73. ?>
  76. <!DOCTYPE html>
  77. <html lang="en">
  79. <head>
  80.     <meta charset="UTF-8">
  81.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  82.     <title>文件上传变量$_FILES</title>
  83. </head>
  85. <body>
  86.     <hr>
  87.     <form action="" method="post" enctype="multipart/form-data">
  88.         <fieldset>
  89.             <legend>单文件上传：文件移动</legend>
  90.             <input type="hidden" name="MAX_FILE_SIZE" value="3000000">
  91.             <input type="file" name="my_pic" id="">
  92.             <button>上传</button>
  93.         </fieldset>
  94.     </form>
  95. </body>
  97. </html>

2.多文件上传

  1. <?php
  2. // $_FILES
  3. printf('<pre>%s</pre>', print_r($_FILES, true));
  4. $files = array_pop($_FILES);
  5. if (is_array($files)) {
  6.     foreach ($files['error'] as $key => $error) {
  7.         if ($error === UPLOAD_ERR_OK) {
  8.             //文件类型检查
  9.             $fileType = $files['type'][$key];
  10.             $types = ['image/jpeg', 'image/png', 'image/gif'];
  11.             if (in_array($fileType, $types)) {
  12.                 $originalFilName = $files['name'][$key];
  13.                 $tmpFileName = $files['tmp_name'][$key];
  14.                 //目标文件名称
  15.                 $destFileName = 'uploads/' . md5(mt_rand(1, 1000) . time()) . strstr($originalFilName, '.', true);
  16.                 move_uploaded_file($tmpFileName, $destFileName);
  17.                 echo "<img src='{$destFileName}' width='200'>";
  18.             }
  19.         }
  20.     }
  21. }
  24. ?>
  26. <!DOCTYPE html>
  27. <html lang="en">
  29. <head>
  30.     <meta charset="UTF-8">
  31.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  32.     <title>文件上传变量$_FILES</title>
  33. </head>
  35. <body>
  36.     <hr>
  37.     <form action="" method="post" enctype="multipart/form-data">
  38.         <fieldset>
  39.             <legend>多文件上传：逐个上传（二）</legend>
  40.             <input type="hidden" name="MAX_FILE_SIZE" value="3000000">
  41.             <input type="file" name="my_pic[]" id="">
  42.             <input type="file" name="my_pic[]" id="">
  43.             <input type="file" name="my_pic[]" id="">
  44.             <button>上传</button>
  45.         </fieldset>
  46.     </form>
  47. </body>
  49. </html>

3.批量文件上传

  1. <?php
  2. // $_FILES
  3. printf('<pre>%s</pre>', print_r($_FILES, true));
  4. $files = array_pop($_FILES);
  5. if (is_array($files)) {
  6.     foreach ($files['error'] as $key => $error) {
  7.         if ($error === UPLOAD_ERR_OK) {
  8.             $originalFileName = $files['name'][$key];
  9.             $tmpFileName = $files['tmp_name'][$key];
  10.             $destFileName = 'uploads/' . md5(mt_rand(1, 1000) . time()) . strstr($originalFileName, '.', true);
  11.             move_uploaded_file($tmpFileName, $destFileName);
  12.             echo "<img src='{$destFileName}' width='200'>";
  13.         }
  14.     }
  15. }
  18. ?>
  21. <!DOCTYPE html>
  22. <html lang="en">
  24. <head>
  25.     <meta charset="UTF-8">
  26.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  27.     <title>文件上传变量$_FILES</title>
  28. </head>
  30. <body>
  31.     <hr>
  32.     <form action="" method="post" enctype="multipart/form-data">
  33.         <fieldset>
  34.             <legend>单文件上传：文件移动</legend>
  35.             <input type="hidden" name="MAX_FILE_SIZE" value="3000000">
  36.             <input type="file" name="my_pic[]" id="" multiple>
  37.             <button>上传</button>
  38.         </fieldset>
  39.     </form>
  40. </body>
  42. </html>

总结：文件上传最主要的就是要用到超全局变量$_FILE，所有的文件上传信息都在这个数组里面。文件上传有7中类型编码，没有5，从0-7分别对应的是“文件上传成功”、“文件超过php.ini中upload_max_filesize值”、“文件超过表单中MAX_FILE_SIZE指定的值”、“文件只有部分上传”、“文件没有被上传”、“找不到临时文件夹”、“文件写入失败”。判定时也可以用对应的常量来判定。

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：其实有一些代码, 你完全可以按自己的思路来写的, 不一定要和我一样
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