你知道Laravel的$this->app以及app()是怎么来的吗?
时间:2022-03-03 11:48
下面由laravel教程栏目给大家介绍Laravel的$this->app以及app()是怎么来的,希望对需要的朋友有所帮助!
断点调试寻找对应文件,忽略次要步骤,仅描述核心动作,‘/’表示index.php所在目录
地址:index.php
$app = require_once __DIR__.'/../bootstrap/app.php';
$app初始化
路径/…/bootstrap/app.php
$app = new Illuminate\Foundation\Application( realpath(__DIR__.'/../') );//$app初始化工作
$app初始化的类及构造函数
class Application extends Container implements ApplicationContract,HttpKernelInterface { //继承Container类,Container类实现应用契约接口与请求接口 public function __construct($basePath = null){ if ($basePath) {//$basePath = '/../' $this->setBasePath($basePath);//路径绑定 } $this->registerBaseBindings();//基础绑定 $this->registerBaseServiceProviders();//注册基础服务提供者 $this->registerCoreContainerAliases();//注册别名 } }
路径绑定
Application的setBasePath(’/…/’)方法调用Container的instance(a b s t r a c t , abstract,abstract,instance)方法赋值Contaienr类instances instances: array:9 [▼ “path” => “\var\www\app” “path.base” => “\var\www” “path.lang” => “\var\www\resources\lang” “path.config” => “\var\www\config” “path.public” => “\var\www\public” “path.storage” => “\var\www\storage” “path.database” => “\var\www\database” “path.resources” => “\var\www\resources” “path.bootstrap” => “\var\www\bootstrap” ]
基础绑定
向Container的instances中添加绑定
"app" => Application {#2} "Illuminate\Container\Container" => Application {#2} "Illuminate\Foundation\PackageManifest" => PackageManifest {#4 ▼ +files: Filesystem {#5} +basePath: "\var\www" +vendorPath: "\var\www\vendor" +manifestPath: "\var\www\bootstrap\cache\packages.php" +manifest: null }
app与Container指向当前实例
PackageMainfest 为包管理实例,构造方法中files注册文件系统实例
注册基础服务提供者
//class Application protected function registerBaseServiceProviders() { $this->register(new EventServiceProvider($this)); $this->register(new LogServiceProvider($this)); $this->register(new RoutingServiceProvider($this)); }
Event、Log、Routing基础服务继承ServiceProvider,初始化的时候将app属性赋值Application实例
//class ServiceProvider public function __construct($app) { $this->app = $app; }
执行Application类register方法
//Application public function register($provider, $options = [], $force = false) { if (is_string($provider)) { $provider = $this->resolveProvider($provider); } if (method_exists($provider, 'register')) { $provider->register();//赋值bindings } //将服务提供者添加到serviceProviders属性队列 //将服务提供者类名添加到loaderProviders属性 $this->markAsRegistered($provider); return $provider; }
为provider注册提供了两种方法;
一种是字符串类名直接实例,
一种是执行$$provider->register()方法注册,
当前执行第二种方法,
回看当前EventServiceProvider实例的register方法
public function register() { $this->app->singleton('events', function ($app) { return (new Dispatcher($app))->setQueueResolver(function () use ($app) { return $app->make(QueueFactoryContract::class); }); }); }
调用Application实例的singleton方法
//class Continer public function singleton($abstract, $concrete = null) { $this->bind($abstract, $concrete, true); }
调用bind方法,赋值bindings
//class Container public function bind($abstract, $concrete = null, $shared = false) { if (is_null($concrete)) { $concrete = $abstract; } if (! $concrete instanceof Closure) { $concrete = $this->getClosure($abstract, $concrete); } $this->bindings[$abstract] = compact('concrete', 'shared'); }
回到Application类register方法中并执行markAsRegistered($provider)
//class Application protected function markAsRegistered($provider) { $this->serviceProviders[] = $provider; $this->loadedProviders[get_class($provider)] = true; }
LogServerProvider、RoutingServiceProvider与之类似
别名绑定
//class Application public function registerCoreContainerAliases() { foreach ([ 'app' => [self::class, \Illuminate\Contracts\Container\Container::class, \Illuminate\Contracts\Foundation\Application::class, \Psr\Container\ContainerInterface::class], 'auth' => [\Illuminate\Auth\AuthManager::class, \Illuminate\Contracts\Auth\Factory::class], 'auth.driver' => [\Illuminate\Contracts\Auth\Guard::class], 'blade.compiler' => [\Illuminate\View\Compilers\BladeCompiler::class], 'cache' => [\Illuminate\Cache\CacheManager::class, \Illuminate\Contracts\Cache\Factory::class], 'cache.store' => [\Illuminate\Cache\Repository::class, \Illuminate\Contracts\Cache\Repository::class], 'config' => [\Illuminate\Config\Repository::class, \Illuminate\Contracts\Config\Repository::class], 'cookie' => [\Illuminate\Cookie\CookieJar::class, \Illuminate\Contracts\Cookie\Factory::class, \Illuminate\Contracts\Cookie\QueueingFactory::class], 'encrypter' => [\Illuminate\Encryption\Encrypter::class, \Illuminate\Contracts\Encryption\Encrypter::class], 'db' => [\Illuminate\Database\DatabaseManager::class], 'db.connection' => [\Illuminate\Database\Connection::class, \Illuminate\Database\ConnectionInterface::class], 'events' => [\Illuminate\Events\Dispatcher::class, \Illuminate\Contracts\Events\Dispatcher::class], 'files' => [\Illuminate\Filesystem\Filesystem::class], 'filesystem' => [\Illuminate\Filesystem\FilesystemManager::class, \Illuminate\Contracts\Filesystem\Factory::class], 'filesystem.disk' => [\Illuminate\Contracts\Filesystem\Filesystem::class], 'filesystem.cloud' => [\Illuminate\Contracts\Filesystem\Cloud::class], 'hash' => [\Illuminate\Contracts\Hashing\Hasher::class], 'translator' => [\Illuminate\Translation\Translator::class, \Illuminate\Contracts\Translation\Translator::class], 'log' => [\Illuminate\Log\Writer::class, \Illuminate\Contracts\Logging\Log::class, \Psr\Log\LoggerInterface::class], 'mailer' => [\Illuminate\Mail\Mailer::class, \Illuminate\Contracts\Mail\Mailer::class, \Illuminate\Contracts\Mail\MailQueue::class], 'auth.password' => [\Illuminate\Auth\Passwords\PasswordBrokerManager::class, \Illuminate\Contracts\Auth\PasswordBrokerFactory::class], 'auth.password.broker' => [\Illuminate\Auth\Passwords\PasswordBroker::class, \Illuminate\Contracts\Auth\PasswordBroker::class], 'queue' => [\Illuminate\Queue\QueueManager::class, \Illuminate\Contracts\Queue\Factory::class, \Illuminate\Contracts\Queue\Monitor::class], 'queue.connection' => [\Illuminate\Contracts\Queue\Queue::class], 'queue.failer' => [\Illuminate\Queue\Failed\FailedJobProviderInterface::class], 'redirect' => [\Illuminate\Routing\Redirector::class], 'redis' => [\Illuminate\Redis\RedisManager::class, \Illuminate\Contracts\Redis\Factory::class], 'request' => [\Illuminate\Http\Request::class, \Symfony\Component\HttpFoundation\Request::class], 'router' => [\Illuminate\Routing\Router::class, \Illuminate\Contracts\Routing\Registrar::class, \Illuminate\Contracts\Routing\BindingRegistrar::class], 'session' => [\Illuminate\Session\SessionManager::class], 'session.store' => [\Illuminate\Session\Store::class, \Illuminate\Contracts\Session\Session::class], 'url' => [\Illuminate\Routing\UrlGenerator::class, \Illuminate\Contracts\Routing\UrlGenerator::class], 'validator' => [\Illuminate\Validation\Factory::class, \Illuminate\Contracts\Validation\Factory::class], 'view' => [\Illuminate\View\Factory::class, \Illuminate\Contracts\View\Factory::class], ] as $key => $aliases) { foreach ($aliases as $alias) { $this->alias($key, $alias); } } }
为alias属性赋值
$app核心类绑定
/…/bootstrap/app.php /** *核心类绑定 */ $app->singleton( Illuminate\Contracts\Http\Kernel::class, App\Http\Kernel::class ); $app->singleton( Illuminate\Contracts\Console\Kernel::class, App\Console\Kernel::class ); $app->singleton( Illuminate\Contracts\Debug\ExceptionHandler::class, App\Exceptions\Handler::class );
调用bind函数
//class Container public function singleton($abstract, $concrete = null) { $this->bind($abstract, $concrete, true); }
对字符串类名进行默认回调函数绑定
//class Container public function bind($abstract, $concrete = null, $shared = false) { // If the factory is not a Closure, it means it is just a class name which is // bound into this container to the abstract type and we will just wrap it // up inside its own Closure to give us more convenience when extending. if (! $concrete instanceof Closure) { $concrete = $this->getClosure($abstract, $concrete); } $this->bindings[$abstract] = compact('concrete', 'shared'); }
getClosure返回默认回调函数
//class Container protected function getClosure($abstract, $concrete) { return function ($container, $parameters = []) use ($abstract, $concrete) { if ($abstract == $concrete) { return $container->build($concrete); } return $container->make($concrete, $parameters); }; }
最终:返回$app
/…/bootstrap/app.php return $app;
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