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单文件上传
晨
Original
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单文件上传php代码

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <?php
  4. //$_FILES:php超全局变量，保存着上传文件的全部信息
  5. printf('<pre>%s</pre>',print_r($_FILES,true));
  6. /**
  7.  * 1.$_FILES:二维数组，每个元素对应一个上传的文件
  8.  * 2.name:原始文件名
  9.  * 3.type:文件类型，mime类型
  10.  * 4.tmp_name:临时目录
  11.  * 5.error:错误代码
  12.  * 6.size:文件大小（字节表示 byte）
  13.  */
  15.  if(isset($_FILES['my_pic'])) {
  16.      $name = $_FILES['my_pic']['name'];
  17.      $tmpName = $_FILES['my_pic']['tmp_name'];
  18.      $error = $_FILES['my_pic']['error'];
  19.      if ($error > 0) {
  20.          $tips = '<span style="color:red">上传失败</span>';
  21.          switch ($error) {
  22.              case 1:
  23.                 $tips .= '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。';
  24.                 break;
  25.              case 2:
  26.                 $tips .= '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。';
  27.                 break;
  28.              case 3:
  29.                 $tips .= '文件只有部分被上传。';
  30.                 break;
  31.              case 4:
  32.                 $tips .= '没有文件被上传。';
  33.                 break;
  34.              case 6:
  35.                 $tips .= '找不到临时文件夹。';
  36.                 break;
  37.              case 7:
  38.                 $tips .= '文件写入失败。';
  39.                 break;  
  40.          }
  41.          echo "<p>$tips</p>";
  42.      } else {
  43.        if (is_uploaded_file($tmpName)) {
  44.            $allow = ['jpg','jpeg','png','gif'];
  45.            $ext = pathinfo($name)['extension'];
  46.            if (in_array($ext, $allow)) {
  47.                $path = 'uploads/';
  48.                $dest = $path . md5($name) . '.' . $ext;
  49.                if (move_uploaded_file($tmpName, $dest)) {
  50.                    echo '上传成功';
  51.                    echo "<img src='$dest', width='200'>";
  52.                } else {
  53.                    echo '移动失败';
  54.                }
  55.            } else {
  56.                echo '文件类型错误';
  57.            }
  58.        } else {
  59.            echo '非法方式上传';
  60.        }
  62.     }
  63. }
  64. ?>
  66. <head>
  67.     <meta charset="UTF-8">
  68.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  69.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  70.     <title>Document</title>
  71. </head>
  72. <body>
  73.     <form action="" method="POST" enctype="multipart/form-data">
  74.         <fieldset>
  75.             <legend>单文件上传</legend>
  76.             <input type="hidden" name="MAX_FILE_SIZE" value="400000">
  77.             <input type="file" name="my_pic">
  78.             <button>上传</button>
  79.         </fieldset>
  80.     </form>
  81. </body>
  82. </html>
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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