无法使用 PHP 查看下载文件中的数据

Question

我已经编写了下载文件的代码。使用此代码我正在下载文件，但是当我打开文件时我看不到任何数据。下面是我正在使用的代码。

<?php
$namekey = $_REQUEST['key'];

$tmp = explode(".",$file['namekey']);
switch ($tmp[count($tmp)-1]) {
  case "pdf": $ctype="application/pdf"; break;
  case "exe": $ctype="application/octet-stream"; break;
  case "zip": $ctype="application/zip"; break;
  case "docx":
  case "doc": $ctype="application/msword"; break;
  case "csv":
  case "xls":
  case "xlsx": $ctype="application/vnd.ms-excel"; break;
  case "ppt": $ctype="application/vnd.ms-powerpoint"; break;
  case "gif": $ctype="image/gif"; break;
  case "png": $ctype="image/png"; break;
  case "jpeg":
  case "jpg": $ctype="image/jpg"; break;
  case "tif":
  case "tiff": $ctype="image/tiff"; break;
  case "psd": $ctype="image/psd"; break;
  case "bmp": $ctype="image/bmp"; break;
  case "ico": $ctype="image/vnd.microsoft.icon"; break;
  default: $ctype="application/force-download";
}
$location="uploads/sop/".$namekey."";
$fszie=filesize($location);
header("Pragma: public"); // required
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false); // required for certain browsers
header("Content-Type: $ctype");
header("Content-Disposition: attachment; filename=\"".$namekey."\";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".$fsize);
ob_clean();
flush();
//readfile( 'uploads/sop/'.$file['namekey'] );
readfile( $location);

?>

code.Any 帮助中是否有任何错误，将不胜感激！

提前致谢！

Answer 1

查看前两行代码：

<?php
$namekey = $_REQUEST['key'];

$tmp = explode(".",$file['namekey']);

这里 $file['namekey'] 是未定义的，你应该使用 $namekey:

<?php
$namekey = $_REQUEST['key'];

$tmp = explode(".",$namekey);

Answer 2

不确定到底是什么原因....但是，删除下面的代码后它工作正常......

header("Content-Length: ".$fsize);

谢谢

无法使用 PHP 查看下载文件中的数据

unable to view data from downloaded file using PHP

php

xampp

download