$query_login = "SELECT * FROM users WHERE username='$username' AND password='$password'";
		$result_login = mysqli_query($db, $query_login) or die ( mysqli_error($db) );
		$count_login = mysqli_num_rows($result_login);

		if($count_login){ //daca exista user cu datele alea
			$_SESSION['username']=$username;
			$msg = "Login successful <br> <a href='menu.php'>Go to main menu</a>";
		}