AuctionHub - Online Bidding System

Campus project: build an online auction system where users can list items and others can bid in real-time.

Built with PHP and MySQL. Users list items, others bid, highest bidder wins. Added real-time updates so bidders see current prices without refreshing. Nothing fancy, but it works.

First real project with database relationships and concurrent updates. Learned about race conditions the hard way when two people bid at the same time. Also learned: input validation isn't optional—users will try to break things.