Try
$list = array();
if(time() > $datauser['money_time']+(3600 * 24)){
$mon = $datauser['balans']+100;
mysql_query("UPDATE `users` SET `balans` = '".$mon."', `money_time` = '".time()."' WHERE `id` = '".$user_id."'");
$list[] = 'Daily bonus 100';
}