-<?php
-
-function check_email_address($email) {
- // First, we check that there's one @ symbol,
- // and that the lengths are right.
- if (!ereg("^[^@]{1,64}@[^@]{1,255}$", $email)) {
- // Email invalid because wrong number of characters
- // in one section or wrong number of @ symbols.
- return false;
- }
- // Split it into sections to make life easier
- $email_array = explode("@", $email);
- $local_array = explode(".", $email_array[0]);
- for ($i = 0; $i < sizeof($local_array); $i++) {
- if
- (!ereg("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$",
- $local_array[$i])) {
- return false;
- }
- }
- // Check if domain is IP. If not,
- // it should be valid domain name
- if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1])) {
- $domain_array = explode(".", $email_array[1]);
- if (sizeof($domain_array) < 2) {
- return false; // Not enough parts to domain
- }
- for ($i = 0; $i < sizeof($domain_array); $i++) {
- if
- (!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$",
- $domain_array[$i])) {
- return false;
- }
- }
- }
- return true;
-}
-?>