function fullname($user, $override=false) {

    global $CFG, $SESSION;

    if (!isset($user->firstname) and !isset($user->lastname)) {
        return '';
    }

    if (!$override) {
        if (!empty($CFG->forcefirstname)) {
            $user->firstname = $CFG->forcefirstname;
        }
        if (!empty($CFG->forcelastname)) {
            $user->lastname = $CFG->forcelastname;
        }
    }

    if (!empty($SESSION->fullnamedisplay)) {
        $CFG->fullnamedisplay = $SESSION->fullnamedisplay;
    }

    if ($CFG->fullnamedisplay == 'firstname lastname') {
        if ($CFG->titlecasename == '1') {
            return nametotitlecase($user->firstname) .' '. nametotitlecase($user->lastname);
        } else {
            return $user->firstname .' '. $user->lastname;
        }

    } else if ($CFG->fullnamedisplay == 'lastname firstname') {
    if ($CFG->titlecasename == '1') {
        return nametotitlecase($user->lastname) .' '. nametotitlecase($user->firstname);
    } else {
        return $user->lastname .' '. $user->firstname;
    }

    } else if ($CFG->fullnamedisplay == 'firstname') {
        if ($override) {
            return get_string('fullnamedisplay', '', $user);
        } else {
            if ($CFG->titlecasename == '1') {
                return $user->firstname;
            } else {
                return nametotitlecase($user->firstname);
            }
        }
    }

    return get_string('fullnamedisplay', '', $user);
}


function nametotitlecase($name) {
    $name = strtolower($name);
    $name = join("'", array_map('ucwords', explode("'", $name)));
    $name = join("-", array_map('ucwords', explode("-", $name)));
    $name = join("Mac", array_map('ucwords', explode("Mac", $name)));
    $name = join("Mc", array_map('ucwords', explode("Mc", $name)));
    return $name;
}