컨테이너 클래스를 사용하여 ThinkPHP 핵심 프레임워크 구현

//     * ThinkPHP 5 与 6 在此处参数一致//     * @param string $abstract//     * @param array $vars//     * @param bool $newInstance//     */
    public static function get(string $abstract, array $vars = [], bool $newInstance = false)
    {
        return static::getInstance()->make($abstract, $vars, $newInstance);
    }

protected static $instance;public static function getInstance()
    {
        // 创建自身实例
        if (is_null(static::$instance)) {
            static::$instance = new static;
        }
        return static::$instance;
    }

public function make (string $abstract, array $vars = [], bool $newInstance = false)
    {
        // 这里的 $abstract 是包含有命名空间的类名
        if (isset($this->bind[$abstract])) {
            $abstract = $this->bind[$abstract];
        }

        // 如果已经实例化直接返回
        if (isset($this->instances[$abstract]) && !$newInstance) {
            return $this->instances[$abstract];
        }

        // 如果就创建
        $object = $this->invokeClass($abstract, $vars);

        // 保存实例
        if (!$newInstance) {
        $this->instances[$abstract] = $object;
        }

        return $object;
    }

    protected $bind = [
        'app' => App::class,
        'config' => Config::class,
        'request' => Request::class
    ];

public function invokeClass (string $class, array $vars = [])
    {
        // $vars 为构造函数的参数
        return new $class();
    }

require __DIR__ . '/../core/base.php';use think\Request;$req = \think\Container::get('request');var_dump($req instanceof Request);

    public function __get($abstract)
    {
        // 返回容器的类实例
        return $this->make($abstract);
    }public function __set($abstract, $instance)
    {
        if (isset($this->bind[$abstract])) {
            $abstract = $this->bind[$abstract];
        }
        // 装入容器
        $this->instances[$abstract] = $instance;
    }

$container = \think\Container::getInstance();// 获取容器中的实例，输出对象var_dump($container->request);// 装入容器$container->contianerName = $container;var_dump($container->contianerName);