Hi Jason,
@ 3:08:06 AM on 4/20/2001, Jason Caldwell wrote:
> Sorry if I seem dense. Your answer (although probably right on target)
> leaves me still confused :-)
No problem at all.
> The example you gave me:
> $string = 'aaaa.aaaa';
> print(eregi("^([[:alnum:]]+\.[[:alnum:]]+)", $string) ? 'matched' : 'no
> match');
> Now with your example (above) the following MATCHED (when, I think it
> shouldn't have:)
> (example 1)
> aaaa.a!
Matches because there is *at least* one alnum after the \.
It doesn't care about the ! as long as it found the a.
> aaaa.a#$%
Ditto here.
> aaaa.a23!%
Ditto here.
> The following did NOT match.
> (example 2)
> a!.aaaa
This didnt' match because of ^[[:alnum:]]+\.
There's a [:punct:] between the [:alnum:] and the \.
> a%!.aaaa
Ditto here.
> aaaa.!a34
No [:alnum:] after the \.
Your expression asks for *at least one* [:alnum:]
Changing + to * would make that match.
> Now when I took your example and added the $ at the end, like so:
> print(eregi("^([[:alnum:]]+\.[[:alnum:]]+)$", $string) ? 'matched' : 'no
> match');
> Everything that MATCHED in example 1 no longer matched,
Right, because it had a [:punct:] before the end of the string and you
forced it to only pick up [:alnum:]'s
-Brian
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