让浏览器使用特定名称来下载文件

Question

I am having trouble getting the browser to prompt the user to save an image with the correct name.

• My web root directory is /var/www/html
• I have an image (.jpg) in /var/www/client/image.jpg

These two things cannot be changed for a number of reasons

I have a file, dImage.php, in /var/www/html where I am doing the following to get the browser to download, not view the file.

$fileName = '/var/www/client/image.jpg';    

header('Content-disposition: attachment; filename="' . $fileName . '"');
header('Content-type: image/jpeg');
readfile($fullpath);

In IE I get prompted to download dImage.jpg

In Firefox I get prompted to download dImage.php which is a: JPEG Image. When I download the file there it's saved as a .php file which, once the extension is changed, opens aproperly as an image.

Is it possible for me to have the browser prompt the user to save the file as image.jpg regardless of the browser being used?

Answer 1

The code you have shown will produce a file with a name of '/var/www/client/image.jpg' which is obviously not a valid file name, which is why your file gets named after the script.

$fileName is the desired name of the output file,
$fullpath should be the absolute path to the desired file, php's relative paths do not work like HTML's paths do. '/' will not point you to the document root folder.