mysql stored procedure

mysql_query("INSERT INTO online (timestamp, ip, file) VALUES('$timestamp','".$online1."','".$online2."')");
//Delete Users
mysql_query("DELETE FROM online WHERE timestamp<$timeout");
//Fetch Users Online
$result = mysql_query("SELECT DISTINCT ip FROM online");

DELIMITER $$
DROP PROCEDURE IF EXISTS `onlist`.`online_list` $$
CREATE PROCEDURE `onlist`.`online_list` (in timestamp int, in online1 varchar, in online2 varchar,  in timeout int)
BEGIN
//sorgularım
END $$
DELIMITER ;

DELIMITER $$
DROP PROCEDURE IF EXISTS `my_table`.`online_list` $$
CREATE PROCEDURE `my_table`.`online_list` (in timestamp int, in timeout int, in online1 varchar, in online2 varchar, out sonuc varchar)
BEGIN
insert into online (timestamp, ip, file) values(timestamp, online1, online2);
delete from online where timestamp < timeout;
set sonuc =(select DISTINCT ip from online);
END $$
DELIMITER ;