How would I go about doing the DNS look up part?
"Markus Lervik" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> On Tuesday 12 February 2002 06:19, CrossWalkCentral wrote:
> > I am working on a form that I have in php and am looking for some advise
> > on form validation or specifically email address validation so i can
> > insure that some one has put in a properly formatted email address
> Well. something like
> if (!eregi("^[A-Za-z0-9\_-]+@[A-Za-z0-9\_-]+.[A-Za-z0-9\_-]+.*", $email))
> echo "$email doesn't seem to be a valid e-mail address!";
> would do the job. Of course, that doesn't stop people from entering a
> email address. You could do a DNS-lookup to see if the domain-part of
> the address really exists, too.
> Markus Lervik
> Linux-administrator with a kungfoo grip
> Vaasa City Library - Regional Library
> [EMAIL PROTECTED]
> +358-6-325 3589 / +358-40-832 6709
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