<?php

@$db = mysqli_connect("localhost", "", "", "");

if (mysqli_connect_errno()) {
  printf("Verbindung fehlgeschlagen: %s\n", mysqli_connect_error());
  exit();
}
$query = mysqli_query(db, 'SELECT * FROM login WHERE username =  $_POST["username"]');
$result = mysqli_fetch_assoc($query);


if (!is_null($result) && md5($_POST['passwort'] === $result['passwort']);

	echo "Login erfolgreich";

else
	echo "Ungültiger Benutzername und/oder Passwort";

mysqli_free_result($result);

mysqli_close($db);

?>