<?php
//include the database information
include 'ipbdbauth.php';

$username = $_GET['u'];
$password = $_GET['p'];
function userLoginIpb($username, $password) { //select the password information froms elected user
	global $___mysqli_ston;
    $s = mysqli_real_escape_string($___mysqli_ston, $password);
    $query = mysqli_query($GLOBALS["___mysqli_ston"], "SELECT `members_pass_salt`, `members_pass_hash` FROM `members` WHERE `name` = '$s'");
    $results = mysqli_fetch_assoc($query);
    $password = md5(md5($results['members_pass_salt']).md5($password));
        if($password == $results['members_pass_hash']) {
            return true;
            }
            else {
                return false;
                }
} //check if user is logged in
Usage:
if(userLoginIpb($username, $password))
{

$nameresult = mysqli_query($GLOBALS["___mysqli_ston"], "SELECT * FROM members WHERE name='$username'");

//fetch tha data from the database
while ($row = mysqli_fetch_array($nameresult)) {
   echo $row{'member_group_id'};
}
}
else
{
    echo 'Login Incorrect';
}
    mysqli_close($dbhandle);
?>