inser function

[nakresimin]

i think with this function users can add some amount to their account but what i would like to do is each day user login i want to add the some amount automatically.
each day user login to the site i want to add 1000coins amount to their account
and if only possible
each login i also want user to get 10 coins

function addAmountcoins($member_id, $change_amount_coins) {

		$ret = false;

		$exists_arr = $this->isBalanceExists($member_id);

		if($exists_arr["status"] == true) {

			if($exists_arr["results"]["exists"] == true) {

				$q = "UPDATE balance SET amount_coins=amount_coins+$change_amount_coins, record_date=NOW() WHERE member_id='$member_id' LIMIT 1";				

			} else {

				$q = "INSERT INTO balance(member_id, amount_coins,record_date) VALUES($member_id,$change_amount_coins,NOW())";

			}

			//echo $q;

			$rs = $this->db->query($q);

			if($rs) {

				$this->amount_coins += $change_amount_coins;

				$sql = "insert into balance_change (`id`, `member_id`, `direction`, `change_amount_coins`, `balance_amount_coins`, `record_date`, `transaction_type_code`) values('', $member_id, '+', $change_amount_coins, $this->amount_coins, now(), 'CI' )";

				$query=mysql_query($sql);

				$ret = true;

			}

		}

		return $ret;

	}