PHP header function directly prompts the saved code when downloading the file

$filename = 'path + actual file name';
//Type of file
header('Content-type: application/pdf');
//Name displayed when downloading
header ('Content-Disposition: attachment; filename="Save file name.pdf"');
readfile("$filename");
exit();
?>

Provide an online withdrawal There are many ways to implement downloading using php header functions.

if (isset($link))
{
Header("HTTP/1.1 303 See Other");
Header("Location: $link");
exit;
}
?>

$link is the actual path of the file.

Attached is a list of Content-Type types of HTTP headers that the server responds to.