TBH, You can pretty much do a single PHP file, with no dependencies, and without mod_rewrite. Just site.com/?fDS- for example, and it redirects. Storage can be

TBH, You can pretty much do a single PHP file, with no dependencies, and without mod_rewrite. Just site.com/?fDS- for example, and it redirects. Storage can be MySQL or some other DB or even a flat file with locking.