Adding discount script...

All,
I have been working on a small script that will detect the day of the month,
and apply that percent off of an item. For example, on the 3rd, 3% off,
12th, 12% off, etc.

This is what I have so far, does it look correct ?

$t = (intval(date("j")) / 10);
$p = explode(".", $price); // $price is returned from the db in this format
10.00
$np = number_format($p[0] - $t, 2);

Any improvements ?
Thanks.

*** StinkFinger escribió/wrote (Sat, 4 Sep 2004 12:52:20 -0800):
> $p = explode(".", $price); // $price is returned from the db in this format
> 10.00

If you want to truncate the price just use (int)$price in your formula. I
just wonder why you don't round().

--
--
-+ Álvaro G. Vicario - Burgos, Spain - ICQ 46788716
+- http://www.demogracia.com (la web de humor para mayores de 100 años)
++ «Sonríe, que te vamos a hacer una foto para la esquela»
--

Thanks. I've reworked the code and came up w/this:

//$p is returned from a db like this 10.00
$np = number_format((intval($p) - (intval(date("j")) / 10)), 2);
echo $np; //returns 9.60 (for today)

I cannot figure out either how or why I would use round().
Can you provide an example ?
Thanks.

"Alvaro G. Vicario" <kAlvaroNOSPAMTHANKS@terra.es> wrote in message
news:ajh7z5rzrc7h$.v0nn7qif0pk0$.dlg@40tude.net...
> *** StinkFinger escribió/wrote (Sat, 4 Sep 2004 12:52:20 -0800):
>> $p = explode(".", $price); // $price is returned from the db in this
>> format
>> 10.00
>
> If you want to truncate the price just use (int)$price in your formula. I
> just wonder why you don't round().
>
> --
> --
> -+ Álvaro G. Vicario - Burgos, Spain - ICQ 46788716
> +- http://www.demogracia.com (la web de humor para mayores de 100 años)
> ++ «Sonríe, que te vamos a hacer una foto para la esquela»
> --

*** StinkFinger escribió/wrote (Sat, 4 Sep 2004 15:02:21 -0800):
> I cannot figure out either how or why I would use round().
> Can you provide an example ?

If the price is 25.99 and you truncate 25, you carry an error of 99 cents.
If you round to 26, the error is 1 cent. Rounding, the error is never
larger than 50 cents.


--
--
-+ Álvaro G. Vicario - Burgos, Spain - ICQ 46788716
+- http://www.demogracia.com (la web de humor para mayores de 100 años)
++ «Sonríe, que te vamos a hacer una foto para la esquela»
--

> If the price is 25.99 and you truncate 25, you carry an error of 99 cents.
> If you round to 26, the error is 1 cent. Rounding, the error is never
> larger than 50 cents.

Ok, I see now. Thanks for pointing that out. In my case, all my prices are
even dollar amounts, but I will keep that in mind if I ever need to change
it.

Thanks again.