On Mon, 8 Jul 2002, Justin French wrote: > 1. in the case of most dial-up users with an ISP, the IP address is usually > dynamically assigned, so next time they dial-up (or re-connect) they will > more than likely have a different IP address. > > 2. in the many cases of computers with a static IP (cable/ADSL/etc), the IP > address does not necessarily represent a "user"... think about shared > computers in families, in libraries, corporations, net cafe's, etc. > > 3. Data storage -- eeek! If you get 1000 visitors with upto 15 bytes > (nnn.nnn.nnn.nnn) each, that's 15k of IP address' you have to search through > constantly, without any real way to make it quicker (eg indexing). That may > not sound so bad, but perhaps when you reach 30000 visitors, it's now upto > 450k. Yuk.
Well, an IP address is only 4 bytes, and they can be sorted and indexed, but otherwise I completely agree with your points. Using IP addresses to recognize people is doomed to failure. miguel -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
