DI Scenario 2

<?php

abstract class Game
{
    abstract function checkLevel();

    public function play()
    {
        $className = get_called_class();

        if ($this->checkLevel() === true) {
            return "{$className} can play";
        }

        return "{$className} can't play";
    }
}


class Mario extends Game
{
    public function checkLevel()
    {
        return true;
    }
}

class Race extends Game
{
    public function checkLevel()
    {
        return false;
    }
}

echo (new Mario)->play() . PHP_EOL;
echo (new Race)->play() . PHP_EOL;