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Google Chrome errors while exporting XLS file using PHP

Posted by: admin July 12, 2020 Leave a comment


I’ve been using a PHP script to export data from my database (mysql) to a XLS file.

While the file export process is working fine on Firefox and IE.

I am getting errors when trying to export using Google Chrome.

The Google Chrome error is

    Duplicate headers received from server

The response from the server contained duplicate headers. This problem is generally the result of a misconfigured website or proxy. Only the website or proxy administrator can fix this issue.

Error 349 (net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION): Multiple distinct Content-Disposition headers received. This is disallowed to protect against HTTP response splitting attacks.

I need some assistance on this.


How to&Answers:

I’ve found out what my problem was in the header section of the PHP export code. The incorrect and correct lines are as follows:


header("Content-Disposition: attachment;filename=\"".$this->filename."\"");


header("Content-Disposition: attachment; filename=\"".$this->filename."\"");

The correction being adding a space between attachment; and filename

Hope this helps.


I had this same problem. However appearing only very rarely. Cause was similar but not quite the same.


header("Content-Disposition: attachment; filename=$filename");


header("Content-Disposition: attachment; filename=\"$filename\"");

$filename sometimes contained spaces resulting in mentionec Chrome error.


I also faced the same problem. While downloading a file having comma in its name it was saying “duplicate headers received” and it is only in chrome. In Firefox it was OK. After that I just changed my code from
header("Content-Disposition: attachment; filename=$myfilename"); to
header("Content-Disposition: attachment; filename=\"$myfilename\""); and it worked fine. Hope it will work for you.


Try this may help you,
header(‘Content-Disposition: attachment; filename=“‘.$file_name.'”‘);

instead of

header(‘Content-Disposition: attachment; filename=’.$file_name);