POP3::checkResponse PHP Method

    private function checkResponse($string)
    {
        if (substr($string, 0, 3) !== '+OK') {
            $this->error = array('error' => "Server reported an error: {$string}", 'errno' => 0, 'errstr' => '');
            if ($this->do_debug >= 1) {
                $this->displayErrors();
            }
            return false;
        } else {
            return true;
        }
    }