$file = "/home/haadb/haa_".date('Y-m-d').".sql.gz";
exec("mysqldump --user=".env('DB_USERNAME')." --password=".env('DB_PASSWORD')." ".env('DB_DATABASE')." | gzip > ".$file);
$chunks = explode('/', $file);
$filename = end($chunks);
header("Content-Disposition: attachment; filename=".$filename);
readfile($file);