Routes and hashed URLs

Yea, that's not hashing ... don't call it that way, terms mean stuff. And you don't really need all of those function calls. base_convert() can handle extremely large numbers, just call it once on the entire string of "slots" and it will be even more efficient - 64 instead of the 66 chars shown in your post.

Anyway, that .htaccess file just redirects $uri to index.php/$uri, which is fine, but framework-level routing is a different thing.

@jreklund's suggestion should get you what you want.