PHP: Readfile works at localhost but not at server

I tried to solve my problems for hours and searched google and several boards, but i haven't found a s开发者_StackOverflow社区olution.

My Problem: I built a PHP-script what generates a download. Code below:

$file = "file.pdf";
$download_folder = "../contents/"; //RELATIV
$type= mime_content_type($download_folder.$file);
    header("Content-Type: $type");
    header("Content-Disposition: attachment; filename=\"$file\"");

    readfile($download_folder.$file);

If I try it at my localhost server (xampp) it works and the download of the file begins. If I upload the script to my hosting server (not an own, it's goneo) i only get a blank page.

Any ideas? Thanks!

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Check for the permission. If you have read permission on the file. you can use chmod command to set permission.

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Make sure you've got error reporting turned on and are displaying everything during development:

ini_set('display_errors', 1);
error_reporting(E_ALL);

That should tell you what the problem is.

My guess is that it's having an issue with the path. Try using an absolute path such as /var/www/vhosts/yoursite.com/httpdocs/contents/file.pdf.

If that fails, then its probably a permissions issue.

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try adding

if (!file_exists($download_folder . $file)) {
   die("can't find the file")
}
if (!is_readable($download_folder . $file)) {
   die("can't read the file")
}

before doing the header() calls. Most likely you've uploaded the filesomewhere other than where this script expects it to be, or isn't readable by the webserver.

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Found the mistake. At the webserver wasn't the function mime_content_type .Thanks for your help