<?php

class Post
{
    public $title;
    public $description;
}

class Post
{
    public string $title;
    public string $description;
}

class Post
{
    private array $data;

    public function __construct(array $data)
    {
        $this->validateData($data);
        $this->data = $data;
    }

    public function getData(): array
    {
        return $this->data;
    }
}

class Post
{
    private string $title;
    private string $description;

    public function __construct(string $title, string $description)
    {
        $this->validateTitle($title);
        $this->validateDescription($description);

        $this->title = $title;
        $this->description = $description;
    }

    public function getTitle(): string
    {
        return $this->title;
    }

    public function getDescription(): string
    {
        return $this->description;
    }
}

class Post
{
    private string $title;
    private string $description;

    public function setTitle(string $title)
    {
        $this->validateTitle($title);
        $this->title = $title;
    }

    public function setDescription(string $description)
    {
        $this->validateDescription($description);
        $this->description = $description;
    }

    public function getTitle(): string
    {
        return $this->title;
    }

    public function getDescription(): string
    {
        return $this->description;
    }
}

class Post
{
    // bla-bla

    public function fromRequest(ServerRequestInterface $request)
    {
        // ...
    }
}

// See https://github.com/fireproofsocks/dto
class Post extends Dto\Dto
{
    protected $schema = [
        'type' => 'object',
        'properties' => [
            'title' => ['type' => 'string'],
            'description' => ['type' => 'string']
        ],
        'additionalProperties' => false
    ];
}