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实例演示 PHP 单文件上传和多文件批量上传
早晨
Original
727 people have browsed it

单文件上传代码

  1. <?php
  2. // $_FILES
  3. // printf('<pre>%s</pre>', print_r($_FILES, true));
  5. if (isset($_FILES['imgs'])) {
  6.     // 原始文件名
  7.     $name =   $_FILES['imgs']['name'];
  8.     // 临时文件名
  9.     $tmpName =   $_FILES['imgs']['tmp_name'];
  10.     // 错误代码
  11.     $error =   $_FILES['imgs']['error'];
  13.     if ($error > 0) {
  14.         $img_t = '<span style="color:red">上传失败!</span><br>';
  15.         switch ($error) {
  16.             case 1:
  17.                 $img_t .= '大小超过了php.ini中的允许上传的文件大小';
  18.                 break;
  19.             case 2:
  20.                 $img_t .= '大小超过了表单中(MAX_FILE_SIZE)的允许上传的文件大小';
  21.                 break;
  22.             case 3:
  23.                 $img_t .= '文件只有部分被上传';
  24.                 break;
  25.             case 4:
  26.                 $img_t .= '没有文件被上传';
  27.                 break;
  28.             case 6:
  29.                 $img_t .= '找不到临时目录';
  30.                 break;
  31.             case 7:
  32.                 $img_t .= '文件写入失败,请检查目录权限';
  33.                 break;
  34.         }
  35.         echo "<p>$img_t</p>";
  36.     } else {
  37.         //判断上传方式是否合法? POST
  38.         if (is_uploaded_file($tmpName)) {
  39.             // 文件类型白名单
  40.             $all_img = ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp'];
  41.             // 获取扩展名
  42.             $ext_name = pathinfo($name)['extension'];
  44.             if (in_array($ext_name, $all_img)) {
  45.                 // 如果上传方式合法,且是允许的类型,则可以移动到指定的目录中了
  46.                 $path = 'attach/';
  47.                 // 为了防止同名覆盖,应该给目标文件名重命名
  48.                 $img_name = $path . md5($name) . time() . '.' . $ext_name;
  49.                 // 将文件从临时目录移动到目标目录中
  50.                 if (move_uploaded_file($tmpName, $img_name)) {
  51.                     echo '<p>上传成功</p>';
  52.                     // 预览
  53.                     echo "<img src='$img_name' width='50px'>";
  54.                 } else {
  55.                 }
  56.             } else {
  57.                 echo '<p>文件类型错误</p>';
  58.             }
  59.         } else {
  60.             echo '<p>上传方式非法</p>';
  61.         }
  62.     }
  63. }
  65. ?>
  66. <!DOCTYPE html>
  67. <html lang="zh-CN">
  69. <head>
  70.     <meta charset="UTF-8">
  71.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  72.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  73.     <title>单文件上传</title>
  74. </head>
  76. <body>
  77.     <!-- 
  78.         1. method: POST 
  79.         2. ecntype: multipart/form-data
  80.     -->
  81.     <form action="" method="POST" enctype="multipart/form-data">
  82.         <fieldset>
  83.             <legend>单文件上传</legend>
  84.             <input type="hidden" name="MAX_FILE_SIZE" value="200000">
  85.             <input type="file" name="imgs">
  86.             <button>上传</button>
  87.         </fieldset>
  88.     </form>
  89. </body>
  91. </html>

运行效果

批量多文件上传代码

  1. <?php
  2. // $_FILES
  3. // printf('<pre>%s</pre>', print_r($_FILES, true));
  4. if (isset($_FILES['imgs'])) {
  5.     foreach ($_FILES['imgs']['error'] as $key => $error) {
  6.         // 0 => UPLOAD_ERR_OK
  7.         if ($error === UPLOAD_ERR_OK) {
  8.             // 原始文件名
  9.             $name = $_FILES['imgs']['name'][$key];
  10.             // 临时文件名
  11.             $tmpName = $_FILES['imgs']['tmp_name'][$key];
  13.             // 判断上传方式是否合法? POST
  14.             if (is_uploaded_file($tmpName)) {
  15.                 // 文件类型白名单
  16.                 $all_img = ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp'];
  17.                 // 获取扩展名
  18.                 $ext_name = pathinfo($name)['extension'];
  20.                 if (in_array($ext_name, $all_img)) {
  21.                     // 如果上传方式合法,且是允许的类型,则可以移动到指定的目录中了
  22.                     $path = 'attach/';
  23.                     // 为了防止同名覆盖,应该给目标文件名重命名
  24.                     $img_name = $path . md5($name) . time() . '.' . $ext_name;
  25.                     // 将文件从临时目录移动到目标目录中
  26.                     if (move_uploaded_file($tmpName, $img_name)) {
  27.                         echo '<p>上传成功</p>';
  28.                         // 预览
  29.                         echo "<img src='$img_name' width='50px'>";
  30.                     } else {
  31.                     }
  32.                 } else {
  33.                     echo '<p>文件类型错误</p>';
  34.                 }
  35.             } else {
  36.                 echo '<p>上传方式非法</p>';
  37.             }
  38.         }
  39.     }
  40. }
  41. ?>
  42. <!DOCTYPE html>
  43. <html lang="zh-CN">
  45. <head>
  46.     <meta charset="UTF-8">
  47.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  48.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  49.     <title>批量多文件上传</title>
  50. </head>
  52. <body>
  53.     <form action="" method="POST" enctype="multipart/form-data">
  54.         <fieldset>
  55.             <legend>批量多文件上传</legend>
  56.             <!-- multiple: 允许同时选择多个 -->
  57.             <input type="file" name="imgs[]" multiple>
  58.             <button>上传</button>
  59.         </fieldset>
  60.     </form>
  61. </body>
  63. </html>

运行效果

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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