Note:
You have to include the @ character, like in the
T-SQL syntax. See the explanation included in
mssql_execute().
var
The PHP variable you'll bind the MSSQL parameter to. You can pass it
by value, or by reference, to retrieve OUTPUT and RETVAL values after
the procedure execution.
Whether the value is an OUTPUT parameter or not. If it's an OUTPUT
parameter and you don't mention it, it will be treated as a normal
input parameter and no error will be thrown.
is_null
Whether the parameter is NULL or not. Passing the NULL value as
var
will not do the job.
maxlen
Used with char/varchar values. You have to indicate the length of the
data so if the parameter is a varchar(50), the type must be
SQLVARCHAR and this value 50.