[PHP] Another Session Question

[Pushpinder Singh Garcha]

Hello all,

I have php ver 4.1.1 running with register_globals() ON on my site.  I 
am trying to use sessions to maintain state during a visit to the site. 
I have read thru the manual, but my mind is still cluttered with 
doubts. I understand that use of the $_SESSION global array will 
greatly add to the security of the site and will prevent variable 
poisoning.

How do I register a session?
The manual (http://www.php.net/manual/en/print/ref.session.php) says 
that there are 2 methods:

Example 1. Registering a variable with $_SESSION.
<?php
session_start();
// Use $HTTP_SESSION_VARS with PHP 4.0.6 or less
if (!isset($_SESSION['count'])) {
    $_SESSION['count'] = 0;
} else {
    $_SESSION['count']++;
}
?>
-----------------------------------------------------------------------

Example 4. Registering a variable with register_globals enabled
<?php
if (!session_is_registered('count')) {
    session_register("count");
    $count = 0;
}
else {
    $count++;
}
?>
---------------------------------------------------------

This is a snippet of the code that I am testing:
<? session_start();
require_once('../Connections/MasterStream.php');
if ( $_POST['validuser'] && ($_POST['password']) ) {
mysql_select_db($database_MasterStream, $MasterStream);
$query_Recordset1 = "SELECT * FROM `admin` WHERE `admin`.username = 
"$_POST['validuser']" AND `admin`.password = "$_POST['password']"";
$Recordset1 = mysql_query($query_Recordset1, $MasterStream) or 
die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);

if ($totalRows_Recordset1)
{
echo "Success!<br>";
  if(!isset($_SESSION['validuser']))
      $_SESSION['validuser'] = 0;
          else $_SESSION['validuser']++;
}

else{
echo "Please try again later<br>";
}
}
?>
Thanks in advance,
Pushpinder