<?php

abstract class Movie
{

}

class CoolMovie extends Movie implements MovieInterface
{
    public function getTitle(): string
    {
        return 'Spider man';
    }

    public function getRating(): int
    {
        return 10;
    }
}

class MiniMovie extends Movie implements MovieInterface
{
    public function getTitle(): string
    {
        return 'Super mini movie';
    }

    public function getRating(): int
    {
        return 7;
    }
}

class SuperMovie extends Movie implements MovieInterface
{
    public function getTitle(): string
    {
        return 'Super movie';
    }

    public function getRating(): int
    {
        return 11;
    }
}

interface MovieInterface
{
    public function getTitle(): string;
    public function getRating(): int;
}

$coolMovie = new CoolMovie();
$miniMovie = new MiniMovie();
$superMovie = new SuperMovie();

function getMovie(MovieInterface $movie)
{
    return $movie->getRating();
}

echo getMovie($coolMovie) . PHP_EOL;
echo getMovie($miniMovie) . PHP_EOL;
echo getMovie($superMovie) . PHP_EOL;