容器实例化时初始化的实例
protected $bind = [
'app' => App::class,
'cache' => Cache::class,
'config' => Config::class,
'console' => Console::class,
'cookie' => Cookie::class,
'db' => Db::class,
'env' => Env::class,
'event' => Event::class,
'http' => Http::class,
'lang' => Lang::class,
'log' => Log::class,
'middleware' => Middleware::class,
'request' => Request::class,
'response' => Response::class,
'route' => Route::class,
'session' => Session::class,
'validate' => Validate::class,
'view' => View::class,
'think\DbManager' => Db::class,
'think\LogManager' => Log::class,
'think\CacheManager' => Cache::class,
// 接口依赖注入
'Psr\Log\LoggerInterface' => Log::class,
];