What are common mistakes developers make with composition vs inheritance?

// Example of Misusing Inheritance
class Animal {
    public function makeSound() {
        return "Some sound";
    }
}

class Dog extends Animal {
    public function makeSound() {
        return "Bark";
    }
}

// Composition example
class SoundBehavior {
    public function makeSound() {
        // Default behavior
        return "Some sound";
    }
}

class BarkBehavior extends SoundBehavior {
    public function makeSound() {
        return "Bark";
    }
}

class Dog {
    private $soundBehavior;

    public function __construct(SoundBehavior $soundBehavior) {
        $this->soundBehavior = $soundBehavior;
    }

    public function performSound() {
        return $this->soundBehavior->makeSound();
    }
}

$dog = new Dog(new BarkBehavior());
echo $dog->performSound(); // Outputs: Bark