<?php
$db_host = 'localhost';
$db_user = 'root';
$db_pass = 'toor';
$db_name = 'authentication';
session_start();

// connect to database
$db = mysqli_connect($db_host, $db_user, $db_pass, $db_name) or die(mysql_error());

if (isset($_POST['register_btn'])){
    session_start();

    $username = mysql_real_escape_string($_POST['username']);
    echo "<script type='text/javascript'>alert('Woohoo 1!')</script>";
    $email = mysql_real_escape_string($_POST['email']);
    echo "<script type='text/javascript'>alert('Woohoo 2!')</script>";
    $password = mysql_real_escape_string($_POST['password']);
    echo "<script type='text/javascript'>alert('Woohoo 3!')</script>";
    $password2 = mysql_real_escape_string($_POST['password2']);

    echo "<script type='text/javascript'>alert('Woohoo!')</script>";