我独自走进 Laravel5.5 的❤（五）

上一节，我走完了bootstrap/app.php的表面，这一节我将走进app.php引入的Illuminate\Foundation\Application类，也就是laravel的核心。
1.

//引入php一个代表匿名函数的类
use Closure;
//引入一个用于报告只在应用运行的时候发生的错误的类
use RuntimeException;
//引入框架的数组类
use Illuminate\Support\Arr;
//引入框架的字符串类
use Illuminate\Support\Str;
//引入框架的http请求类
use Illuminate\Http\Request;
//引入框架的集合类
use Illuminate\Support\Collection;
//引入框架的容器类
use Illuminate\Container\Container;
//引入框架的文件系统类
use Illuminate\Filesystem\Filesystem;
//引入框架的日记服务提供者类
use Illuminate\Log\LogServiceProvider;
//引入框架的服务提供者类
use Illuminate\Support\ServiceProvider;
//引入框架的事件服务提供者类
use Illuminate\Events\EventServiceProvider;
//引入框架的路由服务提供者类
use Illuminate\Routing\RoutingServiceProvider;
//引入框架的http核心接口类
use Symfony\Component\HttpKernel\HttpKernelInterface;
//引入http错误类
use Symfony\Component\HttpKernel\Exception\HttpException;
//引入http核心契约类
use Illuminate\Contracts\Http\Kernel as HttpKernelContract;
//引入环境加载变量类
use Illuminate\Foundation\Bootstrap\LoadEnvironmentVariables;
//引入http基础请求类
use Symfony\Component\HttpFoundation\Request as SymfonyRequest;
//引入http无法找到错误类
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
//引入契约容器
use Illuminate\Contracts\Foundation\Application as ApplicationContract;

解读：引入应用容器支持模块
2.
class Application extends Container implements ApplicationContract, HttpKernelInterface
解读：应用容器类继承容器类并且实现容器契约，http核心接口
3.

/**
 * The Laravel framework version.
 * laravel框架版本号
 * @var string
 */
const VERSION = '5.5.33';

/**
 * The base path for the Laravel installation.
 *laravel安装路径
 * @var string
 */
protected $basePath;

/**
 * Indicates if the application has been bootstrapped before.
 *指出应用是否已经被启动过
 * @var bool
 */
protected $hasBeenBootstrapped = false;

/**
 * Indicates if the application has "booted".
 *指出应用是否已经被启动过
 * @var bool
 */
protected $booted = false;

/**
 * The array of booting callbacks.
 *启动中回调数组
 * @var array
 */
protected $bootingCallbacks = [];

/**
 * The array of booted callbacks.
 *已经启动回调数组
 * @var array
 */
protected $bootedCallbacks = [];

/**
 * The array of terminating callbacks.
 *终止回调数组
 * @var array
 */
protected $terminatingCallbacks = [];

/**
 * All of the registered service providers.
 *所有已经注册的服务提供者数组
 * @var array
 */
protected $serviceProviders = [];

/**
 * The names of the loaded service providers.
 *已经加载的服务提供者的名字数组
 * @var array
 */
protected $loadedProviders = [];

/**
 * The deferred services and their providers.
 *被推迟的服务和他们的提供者
 * @var array
 */
protected $deferredServices = [];

/**
 * A custom callback used to configure Monolog.
 *应用于monolog日记库环境配置的自定义回调
 * @var callable|null
 */
protected $monologConfigurator;

/**
 * The custom database path defined by the developer.
 *开发者自定义的数据库路径
 * @var string
 */
protected $databasePath;

/**
 * The custom storage path defined by the developer.
 *开发者自定义的储存路径
 * @var string
 */
protected $storagePath;

/**
 * The custom environment path defined by the developer.
 *开发者自定义的环境路径
 * @var string
 */
protected $environmentPath;

/**
 * The environment file to load during bootstrapping.
 *启动时加载的环境文件
 * @var string
 */
protected $environmentFile = '.env';

/**
 * The application namespace.
 *应用的命名空间
 * @var string
 */
protected $namespace;

解读：laravel的基础变量
4.

public function __construct($basePath = null)
{
    if ($basePath) {
        //如果根路径不为空，设置根路径为指定路径
        $this->setBasePath($basePath);
    }

    //注册基础的绑定到容器中
    $this->registerBaseBindings();

    //注册所有服务提供者
    $this->registerBaseServiceProviders();

    //注册核心容器集合
    $this->registerCoreContainerAliases();
}

解读：容器的注入