On Thu, January 24, 2008 5:37 am, Emil Edeholt wrote: > Sorry if this is considered off topic. Please ignore the post in that > case. > > My site uses ten digit numbers as ID:s for our products. I would like > the last digit to be a verification/check digit. I was just about to > just make some simple function that would add the other values > together > into a one digit verification digit. But I thought maybe there are > better or worse ways of doing this, since some algorithms probably > produce a more even distribution of verification digits than others > do. > I.e. it would be a shame if I later on notice that half of my ID:s get > 9 as verification. > > Any ideas?
If you are generating the other 9 digits with an even distribution, the check-sum digit will also be even distribution. There's no rocket science here; Just basic arithmetic. :-) -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
