bittorrent

How do I calculate the hash of a torrent file with PHP? I already used the Class BEncoded and it worked, but I wanted to know how it works.

Well, for some time I have been studying about blockchain, consequently P2P networks, until I arrived in IPFS and I found it ... rt contract in PHP, will it be feasible? Thank you all, if I get good answers maybe this will turn into an academic article.