Container.php

<?php
namespace Components\Core;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;

class Container
{
    /** @var Container */
    private static $instance;

    public $container;

    /**
     * Container constructor.
     * @throws \Exception
     */
    private function __construct()
    {
        $containerBuilder = new ContainerBuilder();

        $dirName = str_replace('core', 'config/yml', __DIR__);
        $loader = new YamlFileLoader($containerBuilder, new FileLocator($dirName));
        $loader->load('config.yml', 'yml');
        $containerBuilder->compile();
        $this->container = $containerBuilder;
    }


    /**
     * @return Container
     * @throws \Exception
     */
    public static function instance()
    {
        if (!self::$instance) {
            self::$instance = new self();
        }

        return self::$instance;
    }
}