email validation that works with .co.uk?

[boombanguk]

hi

anyone got some email validation code that works with .co.uk as well as .com? all the versions i've seen only work with .com, thanks.

[bogu]

Show us what u have that work only with .com and not with .co.uk ...

[greenie2600]

Here's one to try - I haven't tested it:

http://regexlib.com/REDetails.aspx?regexp_id=711

It's exceedingly difficult to write an email validation regex that strictly conforms to the RFC 2822 standard - i.e., one which rejects all invalid addresses, and accepts all valid addresses. For most purposes, though, it's sufficient to make sure that the string at least looks like an email address - i.e., that it takes the form [e-mail], where xyz is a valid top-level domain (e.g., .edu, .uk, .com, etc.). (Bear in mind that somewhere may contain a period!)

[NogDog]

# email address validation function
# kudos to http://iamcal.com/publish/articles/php/parsing_email/
function is_valid_email_address($email) {
  $qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
  $dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
  $atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c'.
  '\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
  $quoted_pair = '\\x5c\\x00-\\x7f';
  $domain_literal = "\\x5b($dtext|$quoted_pair)*\\x5d";
  $quoted_string = "\\x22($qtext|$quoted_pair)*\\x22";
  $domain_ref = $atom;
  $sub_domain = "($domain_ref|$domain_literal)";
  $word = "($atom|$quoted_string)";
  $domain = "$sub_domain(\\x2e$sub_domain)*";
  $local_part = "$word(\\x2e$word)*";
  $addr_spec = "$local_part\\x40$domain";
  return preg_match("!^$addr_spec$!", $email) ? 1 : 0;
}

See http://iamcal.com/publish/articles/php/parsing_email/ for an explanation.