A little bot which you can send url to it and get its file in Telegram back
I used this article to download files via curl.
https://medium.com/ph-devconnect/copying-files-from-server-to-server-using-php-and-curl-e5d08368c56b
Also the token.php which is included in the main.php file contains one variable $botToken which its value is my botToken.