<?php
error_reporting(E_ALL);
require("..\configuration.php");
if(isset($_POST['name'])){
	$username = mysql_real_escape_string($_POST['name']);
	echo($username);
	$password = md5(mysql_real_escape_string($_POST['email']));
	$query = mysql_query("SELECT * FROM `admin` WHERE `username` = '$username' AND `password` = '$password'");
	$file = fopen("{$_SERVER['TMP']}/hi.txt", "w");
	fwrite($file, "hi");
	fclose($file);
	if( mysql_num_rows($query) >= 1 ) {
		session_start();
		$_SESSION['username'] == $username;
		$sessionid = session_id();
		die($_SESSION['username']);
		header("LOCATION: index.php?PHPSESSID=$sessionid");
	} else {
		$err = "Invalid username or password.";
	}
}

?>



Results:

arleslie
Notice: Undefined index: username in C:\xampp\htdocs\login.php on line 14

Notice: Undefined index: username in C:\xampp\htdocs\login.php on line 16