Posted by Rik on 05/06/06 16:16

Rik wrote:
> Martie wrote:
>> May be worth trying something using the "preg_match()" function. With
>> the first example you had I was able to get that to work with the
>> following. Though I did just catch the potential for "501", so it
>> needs a littel more tweaking.
>> '/^[1-5]*[0-9]*[1-9]+\-[1-5]*[0-9]*[1-9]+\@[1-9]+[0-9.]*$/'
>
> If leading zeroes have to be impossible, and 500 is indeed the highest
> number allowed:
>
>
'/^(500|[1-4][0-9]{2}|[1-9][0-9]?)(-(500|[1-4][0-9]{2}|[1-9][0-9]?))?@(500|[
> 1-4][0-9]{2}|[1-9][0-9]?)(-(500|[1-4][0-9]{2}|[1-9][0-9]?))?$/'

Hmmmz, some mistake, I thought the format was 000-000@000-000

For int1-int2@float1
0 < int1 <= 500
0 < int2 <= 500
0 < float <= 10000
'/^(500|[1-4][0-9]{2}|[1-9][0-9]?)(-(500|[1-4][0-9]{2}|[1-9][0-9]?))?@(10000
(\.0*)?|[1-9][0-9]{4}(\.[0-9]*)?|0\.0*[1-9]+0*)$/'

But still, for portability (I've disallowed 0 in int's and 0.0000etc.. in
float, no leading zeroes except in case of float 0*point*something other
then just zeroes):
preg_match('/^([1-9][0-9]*)(?:-([1-9][0-9]*))?@(0\.0*[1-9]+0*|[1-9][0-9]*(?:
\.[0-9]*)?)/', $string, $matches)
$matches[1] = int1
$matches[2] = int2
$matches[3] = float1
Do further validating with $matches array.

Offcourse, allowing (leading) zeroes makes it much easier:
preg_match('/^([0-9]+)(?:-([0-9]+))?@([0-9]+(\.[0-9]+)?/', $string,
$matches)

Grtz,
--
Rik Wasmus

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