> -----Original Message-----
> From: Leonard Burton [mailto:[EMAIL PROTECTED]
> Sent: 16 November 2005 03:39
> To: php-general@lists.php.net
>
> Basically here is the regex I used (I am not the best with regexes):
>
> $pattern = "/^[0-9]?[A-Z]{1,2}[0-9][A-Z]{1,3}/";
>
> Here are how they look
> W1W
> W1AW
> WA1W
> AD4HZ
> N9URK
> WB6NOA
> 4N1UBG
>
> I guess this would be better?
>
> $pattern = "/^";
> $pattern .= "([0-9][A-Z][0-9][A-Z]{3})|"; //4N1UBG
> $pattern .= "([A-Z][0-9][A-Z]{1,3})|"; //N9URK, W1AW, W1W
> $pattern .= "([A-Z]{2}[0-9][A-Z]{1,3})"; //WB6NOA, AD4HZ,
> WA1W
> $pattern .= "/";
You should be able to fold the second and third into:
$pattern .= "/([A-Z]{1,2}[0-9][A-Z]{1,3})/"
It would be harder, if even possible, to merge this with the first form,
due to the requirement for exactly 3 letters vs 1-3; some kind of
complicated look-behind might do it, but I don't think I even want to
try!
Cheers!
Mike
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