return true;
}
- // registeredRecently determines if we already have a successful recent registration from user IP.
- // "recent" means "within the last minute" and is set in a query by the following condition:
- // "and created > now() - interval 1 minute". Change if necessary.
+ // registeredRecently determines if we already have successful recent registration(s) from user IP.
+ // "recent" means the following:
+ // - 2 or more registrations during last 10 minutes, or
+ // - 1 registration during last minute.
+ //
+ // This offers some level of protection from bot registrations.
function registeredRecently() {
$mdb2 = getConnection();
$ip_part = ' created_ip = '.$mdb2->quote($_SERVER['REMOTE_ADDR']);
+ $sql = 'select count(*) as cnt from tt_groups where '.$ip_part.' and created > now() - interval 10 minute';
+ $res = $mdb2->query($sql);
+ if (is_a($res, 'PEAR_Error'))
+ return false;
+ $val = $res->fetchRow();
+ if ($val['cnt'] == 0)
+ return false; // No registrations in last 10 minutes.
+ if ($val['cnt'] >= 2)
+ return true; // 2 or more registrations in last 10 mintes.
+
+ // If we are here, there was exactly one registration during last 10 minutes.
+ // Determine if it occurred within the last minute in a separate query.
$sql = 'select created from tt_groups where '.$ip_part.' and created > now() - interval 1 minute';
$res = $mdb2->query($sql);
if (is_a($res, 'PEAR_Error'))
<br>
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