} else {
$cmtx_captcha = trim($_POST['recaptcha_response_field']);
//get and trim entered captcha value
if (empty($cmtx_captcha)) {
//if no captcha value entered
cmtx_error(CMTX_ERROR_MESSAGE_NO_CAPTCHA);
//reject user for entering no captcha value
} else {
//if captcha value entered
require_once $cmtx_path . 'includes/external/recaptcha/recaptchalib.php';
//load captcha script
$cmtx_recaptcha_private_key = cmtx_setting('recaptcha_private_key');
$cmtx_recaptcha_response = recaptcha_check_answer($cmtx_recaptcha_private_key, $cmtx_ip_address, $_POST['recaptcha_challenge_field'], $_POST['recaptcha_response_field']);
if (!$cmtx_recaptcha_response->is_valid) {
//if entered captcha value invalid
cmtx_error(CMTX_ERROR_MESSAGE_WRONG_CAPTCHA);
//reject user for entering wrong captcha value
} else {
if (cmtx_session_set()) {
//if there's a session
$_SESSION['cmtx_captcha'] = cmtx_setting('session_key');
//add captcha completion to session
}
}
}
}
}
}
}
}
/* Akismet */
function cmtx_flood_control_maximum()
{
//check amount of comments does not exceed set maximum within set period
global $cmtx_mysql_table_prefix, $cmtx_page_id;
//globalise variables
$ip_address = cmtx_get_ip_address();
$now = strtotime(date('Y-m-d H:i:s'));
//get current time
$earlier = $now - 3600 * cmtx_setting('flood_control_maximum_period');
//subtract time period from current time
$earlier = date('Y-m-d H:is', $earlier);
//convert to normal date
//count number of comments (if any) within past period by current user
if (cmtx_setting('flood_control_maximum_all_pages')) {
//for all pages
$query = cmtx_db_query("SELECT COUNT(*) as `amount` FROM `" . $cmtx_mysql_table_prefix . "comments` WHERE `ip_address` = '{$ip_address}' AND `dated` > '{$earlier}'");
} else {
//for current page
$query = cmtx_db_query("SELECT COUNT(*) as `amount` FROM `" . $cmtx_mysql_table_prefix . "comments` WHERE `ip_address` = '{$ip_address}' AND `page_id` = '{$cmtx_page_id}' AND `dated` > '{$earlier}'");
}
$result = cmtx_db_fetch_assoc($query);
$amount = $result['amount'];
if ($amount >= cmtx_setting('flood_control_maximum_amount')) {
//if comment amount exceeds allowed amount
cmtx_error(CMTX_ERROR_MESSAGE_FLOOD_CONTROL_MAXIMUM);
//reject user for too many comments within past period
}
}