complex php

complex.php

<?php

class PostController
{
    public function __construct(PostRepository $postRepository) 
    {
        $this->postRepository = $postRepository;
    }

    public function index() 
    {
        return $this->postRepository()->getAll();
    }
}

interface PostRepository
{
    public function getAll();
}

class EloquentPostRepository implements PostRepository
{
    public function getAll() 
    {
        reutrn Post::all();
    }
}

app()->bind(PostRepository::class, EloquertPostRepository::class);