How to refer from one variable to hidden variable?

[hjyn]

Hi All,

I have started with my php source code shown below, and how can I
refer from one var to hidden var?

----------------------------------------------------------------------------
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1"))
{
$insertSQL = sprintf("INSERT INTO users (UserID, UserName, Password)
VALUES (%s, %s, %s)",
GetSQLValueString($_POST['UserID'], "int"),
GetSQLValueString($_POST['UserName'], "text"),
GetSQLValueString($_POST['Password'], "text"));

mysql_select_db($database_SHHConnection, $SHHConnection);
$Result1 = mysql_query($insertSQL, $SHHConnection) or
die(mysql_error());
}

if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1"))
{
$insertSQL = sprintf("INSERT INTO holidaymaker (HMID, Name, Status)
VALUES (%s, %s, %s)",

GetSQLValueString($_POST['HMID'], "int"),
GetSQLValueString($_POST['Name'], "text"),
GetSQLValueString($_POST['Status'], "text"));

mysql_select_db($database_SHHConnection, $SHHConnection);
$Result1 = mysql_query($insertSQL, $SHHConnection) or
die(mysql_error());
}

<input type="hidden" name="UserID" value="">
<input type="hidden" name="HMID" value= "">

----------------------------------------------------------------------------

The "UserID" is generated by MySql with auto_increment.

UserID int(4) auto_increment primary key,

Assume that I want to add new user and the value for UserID is 5
(after auto increment). Then, I want HMID refer to UserID, the value
of HMID is also 5,
thats mean HMID = UserID, how can I do that? What is the command?
Thanks.
Best Regards,
Hau Jyn