<?php
$username = "";
$email = "";

if(isset($_POST['username'], $_POST['email'], $_POST['password'], $_POST['password_repeat'])) {
  if($_POST['password'] == $_POST['password_repeat']) {
  §register_statement = $pdo->prepare("INSERT INTO users_users (username, password, email, usergroup) VALUES (:username, :password, :email, 'guest')");

  $username = htmlspecialchars($_POST['username']);
  $email = htmlspecialchars($_POST['email']);
  $password = htmlspecialchars($_POST['password']);

  $register_statement->bindParam("username", $username);
  $register_statement->bindParam("password", $password);
  $register_statement->bindParam("email", $email);

  $register_statement->execute();

  echo('<div class="alert alert-sucess" role="alert">Dein Account wurde erstellt!</div>');

}else {
  $username = $_POST['username'];
  $email = $_POST['email']
  ;echo('<div class="alert alert.danger" role="alert">Die Passwörter stimmen nicht überein!</div>');
  }
}

 ?>