Get values of userAccount upon Login - php

Question

I am creating a login system for my website. I want to grab the user's userID (aka a primary key out of the database) to use when they log in.
I have 3 files I'm using:
/index.php - that is basically the login form with a username and password fields. It contains this php code:
<?php
session_start();
require_once('../inc/db/dbc.php');
?>
Once form is submitted, it goes to check_buyer.php (/check_buyer.php)
<?php
session_start(); #recall session from index.php where user logged
require_once('../inc/db/dbc.php');
$connect = mysql_connect($h, $u, $p) or die ("Can't Connect to Database.");
mysql_select_db($db);
$LoginUserName = $_POST['userName'];
$LoginPassword = mysql_real_escape_string($_POST['userPass']);
//connect to the database here
$LoginUserName = mysql_real_escape_string($LoginUserName);
$query = "SELECT uID, uUPass, dynamSalt, uUserType FROM User WHERE uUName = '$LoginUserName';";
$result = mysql_query($query);
if(mysql_num_rows($result) < 1) //no such USER exists
{
echo "Invalid Username and/or Password";
}
$ifUserExists = mysql_fetch_array($result, MYSQL_ASSOC);
function isLoggedIn()
{
if(isset($_SESSION['valid']) && $_SESSION['valid'])
#header( 'Location: buyer/' ); # return true if sessions are made and login creds are valid
echo "Invalid Username and/or Password";
return true;
}
function validateUser() {
$_SESSION['valid'] = 1;
$_SESSION['uID'] = (isset($ifUserExists['uID'])) ? $ifUserExists['uID'] : null;
echo 'sessuID: '.$_SESSION['uID'];
$_SESSION['uUserType'] = 1; // 1 for buyer - 2 for merchant
}
$dynamSalt = $ifUserExists['dynamSalt']; #get value of dynamSalt in query above
$SaltyPass = hash('sha512',$dynamSalt.$LoginPassword); #recreate originally created dynamic, unique pass
if($SaltyPass != $ifUserExists['uUPass']) # incorrect PASS
{
echo "Invalid Username and/or Password";
}
else {
validateUser();
}
// If User *has not* logged in yet, keep on /login
if(!isLoggedIn())
{
header('Location: index.php');
die();
}
?>
If the credentials are valid, the user is sent to login_new/buyer/index.php
<?php
session_start();
if($_SESSION['uUserType'] != 1) // error
{
die("
<div class='container_infinity'>
<div class='container_full' style='position:static;'>
<img src='img/error/noAccess.png' style='float:left;' /> <br />
<h2>403 Error: You may not view this page. Access denied.</h2>
</div>
</div>
");
}
function isLoggedIn()
{
return ($_SESSION['valid'] == 1 && $_SESSION['uUserType'] == 1);
}
//if the user has not logged in
if(!isLoggedIn())
{
header('Location: ../index.php');
die();
}
?>
<?php
if($_SESSION['valid'] == 1 && $_SESSION['uUserType'] == 1){
#echo "<a href='../logout.php'>Logout</a>";
echo 'buyerid: '.$_SESSION['uID'];
require_once('buyer_profile.php');
}
else{
echo "<a href='../index.php'>Login</a>";
}
?>
The problem is, when I login with valid credentials it sends me to login_new/buyer/index.php with the account, but is not outputting the buyer ID using the code echo 'buyerid: '.$_SESSION['uID']; what am I doing wrong here?

Answer 1

Try commenting the header() redirect and echo the $_SESSION['uID'] right after you set it in function validateUser() to see if the session data is actually set right there