I think quite a lot of the PHP routers are based on regexes, for better or for worse. One of the most famous is FastRoute by nikic that (from memory) merges all

I think quite a lot of the PHP routers are based on regexes, for better or for worse. One of the most famous is FastRoute by nikic that (from memory) merges all your routes into one big regex and then tells you which route to dispatch based on some index that comes back in the match. I don't know how widely that specific library is still being used though or if it's since been replaced by something better. https://github.com/nikic/FastRoute https://github.com/nikic/FastRoute