$query = $db->query("SELECT errorcount FROM {$tablepre}adminsessions WHERE uid='$discuz_uid' AND ip='$onlineip' AND dateline+1800>'$timestamp'", 'SILENT');

$query = $db->query("SELECT errorcount FROM {$tablepre}adminsessions WHERE uid='$discuz_uid' AND dateline+1800>'$timestamp'", 'SILENT');