$varchar= mb_substr((md5(sha1($_SERVER['REMOTE_ADDR'] . '_c07f67cdf52ccc45f97ae996ebd0ee43' . $_SERVER['HTTP_USER_AGENT']))),0,11);
$varchar= mb_substr((md5(sha1($_SERVER['REMOTE_ADDR'] . '_c07f67cdf52ccc45f97ae996ebd0ee43' . $_SERVER['HTTP_USER_AGENT']))),0,11);