PHP下载的PDF可以从Ubuntu打开，但不能从Windows打开

Question

I have a PHP script on my server which creates and downloads a PDF file. I have tested it out from a Chromium client on my Ubuntu Desktop computer, and it downloads and opens fine.

When I try from windows 7 and windows 8 chrome browsers, the file downloads but then the system is unable to open the file. The error reads,

"it is either not a supported type or it has been damaged...".

Here is the PHP code that prompts the download:

<?php
...
ob_start();

include 'show_report.php';

$content = ob_get_clean();

$tmpfname = tempnam("/var/www/phpAJAX/Reports/", "pdf_");
$handle = fopen($tmpfname, "w");
fwrite($handle, $content);
fclose($handle);



shell_exec('mv '.$tmpfname.' '.$tmpfname.'.html');
$output = shell_exec('wkhtmltopdf --page-size Letter '.$tmpfname.'.html '.$tmpfname.'.pdf');

//echo $content;

header("Content-disposition: attachment; filename=".$_GET['report_name'].".pdf");
header("Content-type: application/pdf");
readfile($tmpfname.'.pdf');


?>

Just wondering if someone can see why this might be happening.

Thanks!

Answer 1

I found a link with a solution that fixed the problem:

http://board.phpbuilder.com/showthread.php?10372951-RESOLVED-Can-t-open-pdf-file-downloaded-via-php-header

If you change the headers to the following PHP code, then the PDF file downloaded correctly and opened correctly on windows and ubuntu.

header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename="FILENAME"'); 
header('Content-Transfer-Encoding: binary'); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); 
header('Pragma: public'); 
header('Content-Length: ' . filesize("PATH/TO/FILE")); 
ob_clean(); 
flush(); 
readfile(PATH/TO/FILE);      
exit();