Илья Герасимов

<?php

namespace App;

class Config {

	private $values = [];

	public function __construct()
	{
		$this->readfile();
	}

	public function readfile()
	{
		// read config.json
		// 
		// save to ->values
	};

	// get
	// set
	// or magic methods

	public function getValue()
	{
		return ...;
	};
}

class App {
	private $_config;
	private $_instance = NULL;

	static public function get_instance()
	{
		if (!$this->_instance)
		{
			$this->_instance = new App;
		}

		return $this->_instance;
	};

	public function __construct()
	{
		$this->_config = new Config;
	}

	public function __get($variable)
	{
		if ($variable === "config")
		{
			return $this->_config;
		}
	};
}


use \App\App;

App::get_instance()
	->config->getValue("my.super.value")