eventespresso / event-espresso-core

            str_pad('', strlen($text_string), $this->get_encryption_key(), STR_PAD_RIGHT)

        );

        $string_bits = str_split($text_string);

        foreach ($string_bits as $k => $v) {

            $temp = ord($v) + ord($key_bits[$k]);

            $string_bits[$k] = chr($temp > 255 ? ($temp - 256) : $temp);

        }

        return $this->_use_base64_encode

            ? base64_encode(implode('', $string_bits))

            : implode('', $string_bits);

            str_pad('', strlen($encrypted_text), $this->get_encryption_key(), STR_PAD_RIGHT)

        );

        $string_bits = str_split($encrypted_text);

        foreach ($string_bits as $k => $v) {

            $temp = ord($v) - ord($key_bits[$k]);

            $string_bits[$k] = chr($temp < 0 ? ($temp + 256) : $temp);

        }

        return implode('', $string_bits);

    }