PHP class that can combine multiple classes and override any of their properties and methods

DynamicOverrideClass.php

<?php
/**
 * Created by PhpStorm.
 * User: ben
 * Date: 20/12/2018
 * Time: 19:07
 */

use Exception;

/**
 * Class DynamicOverrideClass
 *
 * @package App\Classes
 */
class DynamicOverrideClass
{
    /**
     * @var array
     */
    private $_ext = [];

    /**
     * @var array
     */
    private $overrides = [];

    /**
     * @var
     */
    public $_this;

    /**
     * DynamicOverrideClass constructor.
     *
     * @param array|string $extensions
     * @param array|null   $overrides
     */
    function __construct($extensions, array $overrides = null)
    {
        $this->_this = $this;

        if (is_array($extensions)) {
            foreach ($extensions as $extension) {
                $this->addExt($extension);
            }
        } else {
            $this->addExt($extensions);
        }

        $this->overrides = $overrides;
    }

    /**
     * @param $object
     */
    public function addExt($object)
    {
        $this->_ext[] = $object;
    }

    /**
     * @param $var
     *
     * @return null
     */
    public function __get($var)
    {
        if (array_key_exists($var, $this->overrides)) return $this->overrides[$var];
        foreach($this->_ext as $ext) return property_exists($ext,$var) ? $ext->$var : null;
    }

    /**
     * @param $method
     * @param $args
     *
     * @return mixed
     * @throws \Exception
     */
    public function __call($method, $args)
    {
        if (array_key_exists($method, $this->overrides)) return $this->overrides[$method]($this->getMainContext(), ...$args);
        foreach ($this->_ext as $ext) if (method_exists($ext, $method)) return call_user_func_array([$ext, $method], $args);
        throw new Exception("This Method {$method} doesn't exists");
    }

    /**
     * ferMainClass
     */
    private function getMainContext()
    {
        return $this->_ext[0]; // lol
    }
}