So recently I saw a this website: <https://0day.rocks/> and there is a text about this server being a Tor node. But under that is a number of bytes (terabytes) that server has transferred since last reset. I already saw similar thing on other websites but I'm really interested in how to do this in php (if it is even possible). And just to say I'm not asking you to write code for me, I just want someone to tell me what to read or where to get started, etc. Thanks in advance.