SB Android fix 2: new code

			else {
				$user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
				$download_file_name = basename($url);
				if (stripos($user_agent, 'android') !== false) {
					$file_name_array = explode('.', $file_name);
					$last_key = count($file_name_array) - 1;
					$file_name_array[$last_key] = strtoupper($file_name_array[$last_key]);
					$download_file_name = implode('.', $file_name_array);
				}
				header('Content-Disposition: attachment; filename="'.$download_file_name.'"');
			}