Untitled

REGISTER FUNCTION
<?php
$username = "";
$email    = "";
$errors = array();

// connect to the database
$db = mysqli_connect('localhost', 's1806392_admin', 'kJbjej4Y7jxxt3H', 's1806392_logins');

// REGISTER USER
if (isset($_POST['submit'])) {
  // receive all input values from the form
  $username = mysqli_real_escape_string($db, $_POST['username']);
  $email = mysqli_real_escape_string($db, $_POST['email']);
  $password_1 = mysqli_real_escape_string($db, $_POST['password1']);
  $password_2 = mysqli_real_escape_string($db, $_POST['password2']);

  // form validation: ensure that the form is correctly filled ...
  // by adding (array_push()) corresponding error unto $errors array
  if (empty($username)) { array_push($errors, "Username is required"); }
  if (empty($email)) { array_push($errors, "Email is required"); }
  if (empty($password_1)) { array_push($errors, "Password is required"); }

  if ($password_1 != $password_2) {
	array_push($errors, "The two passwords do not match");
  }

  // first check the database to make sure
  // a user does not already exist with the same username and/or email
  $user_check_query = "SELECT * FROM shop_users WHERE username='$username' OR email='$email' LIMIT 1";
  $result = mysqli_query($db, $user_check_query);
  $user = mysqli_fetch_assoc($result);

  if ($user) { // if user exists
    if ($user['username'] === $username) {
      array_push($errors, "Username already exists");
    }

    if ($user['email'] === $email) {
      array_push($errors, "email already exists");
    }
  }

  // Finally, register user if there are no errors in the form
  if (count($errors) == 0) {
  	$password = md5($password_1);//encrypt the password before saving in the database

  	$query = "INSERT INTO shop_users (username, email, password)
  			  VALUES('$username', '$email', '$password')";
  	mysqli_query($db, $query);
  	$_SESSION['username'] = $username;
  	$_SESSION['success'] = "You are now logged in";
  	header('location: index.php');
  }
}
?>
REGISTER PAGE
<?php require_once ("config.php");?>
<?php include("header.php");?>


    <!-- Page Content -->
    <div class="container">

    <body background="https://cdn.discordapp.com/attachments/439349003805786112/531872173183336459/world.png">

      <header>
		<h1 class="text-center" style="color:white;">Register</h1>
		<h2 class="text-center"><?php display_message(); ?></h2>
			<div class="col-sm-4 col-sm-offset-5">
				<!--<form class="" action="" method="post" action="login_user" enctype="multipart/form-data">-->
				<form class="" action="" method="post" enctype="multipart/form-data">
					<div class="form-group"><label for="" style="color:white;">
						Username<input type="text" name="username" class="form-control"></label>
					</div>
					<div class="form-group"><label for="" style="color:white;">
						Email<input type="text" name="email" class="form-control"></label>
					</div>
					 <div class="form-group"><label for="password" style="color:white;">
						Password<input type="password" name="password1" class="form-control"></label>
					</div>
					<div class="form-group"><label for="password" style="color:white;">
						 Confirm Password<input type="password" name="password2" class="form-control"></label>
					 </div>

					<div class="form-group">
					  <input type="submit" name="submit" class="btn btn-primary" >
					  <?php
                        include 'functions.php';
                        echo register_user();?>
					</div>
				</form>
			</div>


    </header>


        </div>

    </div>
</body>
</html>