index voor login page

<?php
		if($_SERVER["REQUEST_METHOD"] == "POST"){
			$username = $_POST["user"];
			$password = $_POST["password"];

			$passwordHash = hash("sha256", $password);

			$conn = new PDO("mysql:host=localhost; dbname=test;", "root", "");
			$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

			$statement = $conn->prepare("SELECT * FROM logintable WHERE UserName = ? AND PasswordHash = ?");
			$statement->bindValue(1, $username);
			$statement->bindValue(2, $passwordHash);

			$statement->execute();

			$user = $statement->fetchObject();
			if($user === false){
				echo("je probeert iets fout");
			}
			else{
				session_start();
				$_SESSION["UserName"] = $user->UserName;
				$_SESSION["LoginId"] = $user->IdLogin;
				Header("Location: chat.php");
			}
		}
	?>

code voor in de service