AddUser.php using PDO

NewAddUser.php

<?php
	$dsn = 'mysql:host=localhost;dbname=dbname';
	$username = 'username';
	$password = 'password';
	$hashOptions = [
		'cost' => 10,
	];
	
	$email = $_GET['email'];
	$userlogin = $_GET['username'];
	$userpass = $_GET['password'];
	$hash = $_GET['hash'];
	
	$secretKey = 'secretkey';
	
	$createdHash = md5($email . $userlogin . $userpass . $secretKey);
	
	if ($createdHash == $hash)
	{
		try
		{
			$dbh = new PDO($dsn, $username, $password);
			$hashedpass = password_hash($userpass, PASSWORD_DEFAULT, $hashOptions);
			
			$statement = $dbh->prepare ("INSERT INTO users (username, password, creationdate, email) values (:username, :hashedpass, NOW(), :email);");
			$statement->bindParam(':username', $userlogin);
			$statement->bindParam(':hashedpass', $hashedpass);
			$statement->bindParam(':email', $email);
			
			$statement->execute();
		}
		catch (PDOException $e)
		{
			echo "Error: " . $e->getMessage() . "<br/>";
			die ();
		}
	}
?>