<VirtualHost *:80>
DocumentRoot /var/www/html/public
<Directory "/var/www/html">
Options Indexes MultiViews FollowSymLinks
        AllowOverride All
</Directory>
XSendFile On
XSendFilePath /var/www/html/public

ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

header("X-Sendfile: $file->path");
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename="$file->name"");
exit;