PHP - Dependency Inversion Container

dependency-inversion-container.php

<?php
/**
 * Class DIC - Dependency Inversion Container
 * - Lazy Loads all objects into existence 
 */
class DIC
{
    /**
     * Holds all callable methods to create our objects
     * @var array
     */
    private $dependencies = array();

    /**
     * Holds all instantiated objects
     * @var array
     */
    private $loadedDependencies = array();

    /**
     * Attempts to pull dependency from the container
     * @param $name
     * @return object
     * @throws \Exception
     */
    public function __get($name) : object
    {
        if (isset($this->loadedDependencies[$name])) {
            return $this->loadedDependencies[$name];
        } else if (isset($this->dependencies)) {
            $dependency = $this->dependencies[$name]();
            $this->loadedDependencies[$name] = $dependency;
            return $dependency;
        } else {
            throw new \Exception('Dependency is\'nt register');
        }
    }

    /**
     * Register dependency and construction method
     * @param string $name
     * @param callable $method
     * @throws \Exception
     */
    public function registerDependency(string $name, callable $method) : void
    {
        if (!isset($this->dependencies[$name])) {
            $this->dependencies[$name] = $method;
        } else {
            throw new \Exception('Dependency with that name is already registered');
        }
    }
}