PHP email validation custom for norway

emailvalidation.php

<?php
$email_a = 'joe@example.com';
$email_b = 'bogus@lærer.på.kæommune.com';


if(check_email_address($email_b)){
    echo "Valid";
}
else{
    echo "Invalid";
}
die();


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(".", $email_array[0]);
    //var_dump($email_array);
    for ($i = 0; $i < sizeof($local_array); $i++) {
         if (!ereg("^(([A-Za-z0-9æøå!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$", $local_array[$i])) {
            return false;
        }
    }
    if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1])) { // Check if domain is IP. If not, it should be valid domain name
        $domain_array = explode(".", $email_array[1]);
        //var_dump($domain_array);
        if (sizeof($domain_array) < 2) {
                return false; // Not enough parts to domain
        }
        $max = sizeof($domain_array);
        for ($i = 0; $i < sizeof($domain_array); $i++) {
            if($i == ($max-1)){
                echo "tester";
                if (!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$", $domain_array[$i])) {
                    return false;
                }
            }
            else{
                if (!ereg("^(([A-Za-z0-9áàäçéèêñóòôöüæøåÆØÅ][A-Za-z0-9áàäçéèêñóòôöüæøåÆØÅ]{0,61}[A-Za-z0-9áàäçéèêñóòôöüæøå])|([A-Za-z0-9áàäçéèêñóòôöüæøå]+))$", $domain_array[$i])) {
                return false;
                }
            }
        }
    }
    return true;
}
?>