How call StoreProcedure with input and output parameter in php code?

[mr_mojtaba]

Hi Experts.
I am using odbc_connect() method to create a connection to my database. I have a store procedure and i need to use it in my php code. i define and use two parameter in store procedure. Now i dont know how define Input parameter and output parameter when i want to use the store procedure in my php code.

My strore procedure code is like:

LTER PROCEDURE [dbo].[Check_IsUsedUsername]
@username nchar(30),
@IsUsed int output
AS
BEGIN
select @IsUsed = (select count(id) from member where username = @username)
select @IsUsed = @IsUsed + (select count(id) from tempMember where username = @username)
END


And my php code is like:

$conn = odbc_connect("Database","sa","1234");
if(!$conn)
{
die("Error in SQL connection.");
}

//sql command
$sql = "{CALL Check_IsUsedUsername(?,?)}";

//prepare command
$rs = odbc_prepare($conn,$sql);

//data bind param
$username = "irmorteza";
$isused = -1;

//////////// How can define input and output parameter for call stroe procedure??????
$success = odbc_execute($rs);