I am trying to create a file (works), zip a file (works), and download. But when I put it in the order I think is correct I get a warning saying headers already sent
My code is:
//TOP Writes to file -this works
$handle=fopen('db_backup.sql','w+');
fwrite($handle,$end);
fclose($handle);
//Creates zip -this works
$zip =array('db_backup.sql');
create_zip($zip,'db_backup.zip',true);
ob_clean();
flush();
//Download the zip get the headers already sent message
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=db_backup.zip');
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('db_backup.zip'));
readfile('db_backup.zip');
unlink($zip_file);
But if I move headers to TOP I do not get the message. But the zip is empty!
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=db_backup.zip');
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('db_backup.zip'));
//TOP Writes to file -this works
$handle=fopen('db_backup.sql','w+');
fwrite($handle,$end);
fclose($handle);
//Creates zip -this works
$zip =array('db_backup.sql');
create_zip($zip,'db_backup.zip',true);
ob_clean();
flush();
//Download the zip get the headers already sent message
readfile('db_backup.zip');
unlink($zip_file);
Related
i want to create a download pdf file, but its always damaged
i had try this code in other function its working correctly but in this function the downloaded file is corrupt
source and downloaded file has same size its 3.899
this is my code before :
if (file_exists($dir)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($dir).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($dir));
readfile($dir);
exit;
}
and i had try this code too for this issue :
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . basename($file) . '"');
header('Content-Transfer-Encoding: binary');
header('Connection: Keep-Alive');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . $length);
set_time_limit(0);
readfile($file);
exit;
i think the problem is in file size,
my code is work corretly in size under 1Mb but i dont know how to change max download size, i had try to search in php.ini but i cant find
====> update
i had try to change file to smaller size file (below 1Mb) but its still damaged
I have a code:
$name = "jeffrey.epub"; //for naming only
$file = "test/cover/cabang.epub"; //the real file to be downloaded
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($name).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
but upon having the download file, it came out corrupted.i also change the header('Content-Type: application/octet-stream'); to header('Content-Type: application/epub+zip'); but still it was corrupted, i was wondering what is the problem that the file is being corrupted
How do I put a link to open a pdf in pdf?
I have a code below which does not work
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;
It just shows the link to download and does not generate my file to download.
I need make xlsx file download from my site (but not from directly open file url like this: http://site.com/file.xlsx )
So, this is php code
$file = "somefile.xlsx";
header('Content-Description: File Transfer');
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
file is downloaded, his extension is .xlsx, but when trying open this file in ms excel, file not opened and I got error : excel cannot open the file.xlsx because the file format or file extension is not valid
Tell please, why this happened? where I am wrong?
After many years, I got same problem, and after searching, I got here again ))
This is solution, that worked for me:
$file = "somefile.xlsx";
// define file $mime type here
ob_end_clean(); // this is solution
header('Content-Description: File Transfer');
header('Content-Type: ' . $mime);
header("Content-Transfer-Encoding: Binary");
header("Content-disposition: attachment; filename=\"" . basename($file) . "\"");
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
readfile($file);
You must be using this code in middle of some other file.
The problem with headers is they need to be set first on a page. They will not work if you have even 1 single space echoing before them. So you need to ob_clean() [clean the buffer] before you are setting headers
Try
ob_clean();
flush();
$file = "somefile.xlsx";
header('Content-Description: File Transfer');
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
Remove:
ob_clean();
flush();
Add at the end of code:
exit();
The issue is that flush() will also throw in your *.xlsx file content some garbage it has in it and that will corupt your file, even if you use ob_clean();
For a better understanding go to php.net and read the difference between flush(), ob_flush() and find that you didn't even need them in the first case. Therefore you won't need the ob_clean() too.
This works for me:
header('Content-Description: File Transfer');
header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
header("Content-Disposition: attachment; filename=\"".basename($fileLocation)."\"");
header("Content-Transfer-Encoding: binary");
header("Expires: 0");
header("Pragma: public");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header('Content-Length: ' . filesize($fileLocation)); //Remove
ob_clean();
flush();
readfile($fileLocation);
I have a document download site where I track files downloaded.
My problem is getting zip files to download through the script I am using. Every other file gets forced to download apart from zip files. When a zip file is pushed it just goes to the download.php page where the script is with no file being pushed out.
ob_start();
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
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($file));
ob_clean();
flush();
readfile($file);
exit;
Here is a code snippet that works for me:
if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) {
header('Content-Type: "application/octet-stream"');
header('Content-Disposition: attachment; filename="'.basename($file_url).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header("Content-Transfer-Encoding: binary");
header('Pragma: public');
header("Content-Length: ".filesize($file_url));
} else {
header('Content-Type: "application/octet-stream"');
header('Content-Disposition: attachment; filename="'.basename($file_url).'"');
header("Content-Transfer-Encoding: binary");
header('Expires: 0');
header('Pragma: no-cache');
header("Content-Length: ".filesize($file_url));
}
readfile($file_url);
Had similar problem, this quotes helped that time:
header('Content-Disposition: attachment; filename="'.basename($file).'"');
I was not using the base_name for the content disposition and length, I had the full path instead. Using base_name worked for me.