bookings
$captcha_instance = new ReallySimpleCaptcha();
$captcha_instance->bg = array(0, 0, 0);
$word = $captcha_instance->generate_random_word();
$prefix = mt_rand();
$captcha_instance->generate_image($prefix, $word);
$correct = $captcha_instance->check($prefix, $the_answer_from_respondent);
$captcha_instance->remove($prefix);
