[YouHack]

Hello,
I'm making a MyBB forum integeration for my gameserver so when people register on it the same thing will apply to forums ( so they will have access to forum too, automatically )
well i disabled registration and i made some edits to my code and i got errors on this:

PHP код:

stock CheckMybbUsers()
{
    new query[1000];
    format(query, sizeof(query), "SELECT * FROM `mybb_users`");
    new Cache: stringresult = mysql_query(SQL, query);
    cache_num_rows() = mybb_users;
    cache_delete(stringresult);
    return 1;
} 


I'm using it to add +1 in UID ( user id ) for each registration...
errors are :

Код:

error 022: must be lvalue (non-constant)
warning 215: expression has no effect

in the check_num_rows line. can you help me with an alternative thing? or just by fixing errors on that?
P.s.: i tried cache_get_row_count() and got same error.