Regarding the problem you are actually asking about:

> > > if (empty($useremail) || !eregi("^([A-Za-z0-9\.\_-])+@([A-Za-z0-9\_-])
> +\.
> > > ([A-Za-z]{2,3})+$", $useremail))
> > Notice the {2,3} which is supposed to limit the last part to 2 or 3
> > letters, but I have been testing this and
> > it allows as many letters as I put in there, but not 1 only.
> > What's wrong?

Please be aware that I use PCRE not POSIX, but IIRC the last phrase says:


any upper or lower case letter,
repeated twice or three times,
and that appearing zero or more times, !!!???
appearing at the end of the string.

Remove the + immediately before the terminating $.


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