强制下载提示php损坏文件
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【中文标题】强制下载提示php损坏文件【英文标题】：Force download prompt php broken file 【发布时间】：2011-12-08 10:16:52 【问题描述】：我现在有当前代码：
if($_POST['mode']=="save")
$path = $_POST['path'];
$file = end(explode('/', $path));
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header("Content-Disposition: attachment; filename=$file");
readfile($file);
我所做的是，获取保存文件的路径，将其分解为仅文件名并尝试保存该文件。我确实收到了另存为提示，但是当我保存它并尝试打开文件时，我收到文件/图像损坏的错误消息。
文件不保存在主目录中，而是保存在名为 uploads 的子目录中。
有人知道我做错了什么吗？
提前致谢。 思南
【问题讨论】：
保存文件的代码是什么？您确定文件已正确保存吗？在读取文件之前，您是否尝试将 readfile() 包含在 is_readable() ... 中？ @macjohn 我刚刚注意到我的文件不可读。为什么不呢？ is_readable() 如果文件名指定的文件或目录存在并且可读，则返回 TRUE，否则返回 FALSE。您的文件不存在，或者您没有权限读取它。 文件/目录现在可读了，但还是无法显示图片。 @macjohn 正在保存的文件大小正确，文件名正确但由于某种原因不想打开。 【参考方案1】：我通常使用这样的东西：
$siteEmail = 'me@myemail.com';
$companyName = 'My Company';
# Path from server root
$fileDirectory = '/home/uploads/'; // include trailing slash
// get the file reference
$passedFile = $_POST['path'];
$filename = @urldecode($passedFile); // useful if your file is sent by $_GET
if((!isset($passedFile))||(@$passedFile==''))
echo "<html><title>".$companyName." - Download File</title><body>ERROR: Please pass a valid filename.<br /><br />Please go back and try again. If you continue to see this message please contact <a href=\"mailto:".$siteEmail."\">".$siteEmail."</a></body></html>";exit();
// required for IE, otherwise Content-disposition is ignored
if(ini_get('zlib.output_compression'))
ini_set('zlib.output_compression', 'Off');
$file_extension = strtolower(substr(strrchr($filename,"."),1));
if( $filename == "" )
echo "<html><title>".$companyName." - Download File</title><body>ERROR: download file NOT SPECIFIED.<br /><br />Please go back and try again. If you continue to see this message please contact <a href=\"mailto:".$siteEmail."\">".$siteEmail."</a></body></html>";
exit;
elseif ( ! file_exists( $fileDirectory . $filename ) )
echo "<html><title>".$companyName." - Download File</title><body>ERROR: File not found.<br /><br />Please go back and try again. If you continue to see this message please contact <a href=\"mailto:".$siteEmail."\">".$siteEmail."</a>
<p>path: ".$fileDirectory.$filename."</p>
<p>DOCUMENT_ROOT: ".$_SERVER['DOCUMENT_ROOT']."</p>
</body></html>";
exit;
;
switch( $file_extension )
case "pdf": $ctype="application/pdf"; break;
case "exe": $ctype="application/octet-stream"; break;
case "zip": $ctype="application/zip"; break;
case "doc": $ctype="application/msword"; break;
case "xls": $ctype="application/vnd.ms-excel"; break;
case "ppt": $ctype="application/vnd.ms-powerpoint"; break;
case "rtf": $ctype="application/rtf"; break;
case "gif": $ctype="image/gif"; break;
case "png": $ctype="image/png"; break;
case "wav": $ctype="audio/wav"; break;
case "mp3": $ctype="audio/mpeg3"; break;
case "wmv": $ctype="video/x-ms-wmv"; break;
case "avi": $ctype="video/avi"; break;
case "asf": $ctype="video/x-ms-asf"; break;
case "mpg": $ctype="video/mpeg"; break;
case "mpeg": $ctype="video/mpeg"; break;
case "jpeg":
case "jpg": $ctype="image/jpg"; break;
default: $ctype="application/force-download";
// Everything went fine - you could log the download in the databse here if required?
// OUTPUT THE FILE
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // cache stop
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // cache stop
header("Cache-Control: must-revalidate"); // cache stop
header("Content-Type: $ctype"); // output filetype
header("Content-Disposition: attachment; filename=\"".basename($filename)."\";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($fileDirectory.$filename));
readfile($fileDirectory.$filename);
exit();
【讨论】：
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