I used to have a website that did this, and I know I didn't code this functionality myself. Basically I have large files that I want people to download from my website, I want people to download from me using my fast server until 5 people are seeding (then stop seeding until the seed count gets below 5).
I am fairly certain this wasn't achieved with Web Seeding I think the program I used was just part of the normal swarm. I also am pretty sure it's PHP based.
What PHP tool/library can I use to provide this feature?