> On 8/27/08, VamVan <[EMAIL PROTECTED]> wrote:
> Hello Guys,
>
> Does any have a regex for email validation? I need to allow only period and
> underscore in the local part , we would need a @ and .com or watever for
> domain.

php should have a good check built-in.

see http://www.php.net/manual/en/function.filter-var.php

if(!filter_var($var, FILTER_VALIDATE_EMAIL)) {
  echo "invalid email";
}

some people also go the extra mile and verify the MX record is valid,
or lookup the MX record and even validate the user exists by querying
the mail server.

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