MicroFrameWork/app/controllers/Posts.php

<?php

namespace app\controllers;


use app\models\Post;

class Posts
{
    public function actionCreatePost($post, $user_id)
    {
        return Post::create(['post'=>$post, 'user_id'=>$user_id]);
    }

    public function actionViewAllPosts()
    {
        foreach (Post::all() as $post)
        {
            echo $post->post . "<br>";
        }
    }
}