AbstractDto.php

<?php
abstract class AbstractDto
{
    /**
     * here the dto stores all the object specific data
     *
     * @var \ArrayObject
     */
    protected $data;

    /**
     * this are all attributes that this DTO can have
     *
     * @var array
     */
    protected $attributes = [];

    /**
     * AbstractDto constructor.
     */
    public function __construct()
    {
        $this->data = new \ArrayObject();
    }

    /**
     * @return \ArrayObject
     */
    public function toArray()
    {
        return $this->data;
    }

    /**
     * @param $name
     * @return mixed|null
     */
    public function __get($name)
    {
        if (!$this->data->offsetExists($name)) {
            return null;
        }

        return $this->data[$name];
    }

    /**
     * @param $name
     * @param $value
     * @return bool
     */
    public function __set($name, $value)
    {
        if (!in_array($name, $this->attributes)) {
            return false;
        }

        $this->data[$name] = $value;

        return false;
    }
}