app
-- controllers
---- MainController.php
---- PostController.php
-- core
---- App.php
---- Controller.php
---- Model.php
---- View.php
-- models
---- PostModel
-- views
---- posts.php
.htaccess
index.php

// View.php

<?php


class View
{
    public function render($template, $data = null)
    {
        include 'app/views/'.$template;
    }
}


// Model.php

<?php


class Model
{
    public $connect;

    public function __construct()
    {
        $this->connect = new PDO('mysql:host=localhost;dbname=app', 'root', '');

    }

}


// Controller.php

<?php

class Controller
{
    public $view;
    public $model;

    public function __construct()
    {
        $this->view = new View();
        $this->model = new Model();

    }

}

// PostModel.php

<?php


class PostModel extends Model
{

    public function getPosts()
    {
        $this->connect->query('SELECT * FROM articles')->fetchAll(PDO::FETCH_OBJ);

    }

}


// PostController

<?php


class PostController extends Controller
{
    public function __construct()
    {
        $this->model = new PostModel();
        $this->view = new View();
    }

    public function indexAction()
    {
        $posts = $this->model->getPosts();
        $this->view->render('posts.php', $posts);
    }

}


// posts.php

<?php foreach ($posts as $post): ?>
<h1><?= $post->title ?></h1>
<?php endforeach; ?>