Question

I have a piece of code that allow users download file from server (document such as docs,docx,pdf etc).

Users can download files but it has some errors like the files were broken. For example, a MS Word file after download need to recovery to read content.

I wonder that if there is any mistake in this code (or problem when uploading?).

$size_of_file = filesize($download_path);
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=' . $file_name);
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: ' . $size_of_file);
//read file from physical path
readfile($download_path);

Answer 1

I found the root of the problem, I hav some extra spaces after php close tag. Thank you guys.