ThinkPHP6 应用初始化（源码分析）

public function __construct(string $rootPath = '')
{
    $this->thinkPath   = dirname(__DIR__) . DIRECTORY_SEPARATOR;
    $this->rootPath    = $rootPath ? rtrim($rootPath, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR : $this->getDefaultRootPath();
    $this->appPath     = $this->rootPath . 'app' . DIRECTORY_SEPARATOR;
    $this->runtimePath = $this->rootPath . 'runtime' . DIRECTORY_SEPARATOR;
    if (is_file($this->appPath . 'provider.php')) {
        $this->bind(include $this->appPath . 'provider.php');
    }
    static::setInstance($this);
    $this->instance('app', $this);
    $this->instance('think\Container', $this);
}

public function initialize()
{
    $this->initialized = true;
    $this->beginTime = microtime(true);
    $this->beginMem  = memory_get_usage();
    // 加载环境变量
    if (is_file($this->rootPath . '.env')) {
        $this->env->load($this->rootPath . '.env');
    }
    $this->configExt = $this->env->get('config_ext', '.php');
    $this->debugModeInit();
    // 加载全局初始化文件
    $this->load();
    // 加载框架默认语言包
    $langSet = $this->lang->defaultLangSet();
    $this->lang->load($this->thinkPath . 'lang' . DIRECTORY_SEPARATOR . $langSet . '.php');
    // 加载应用默认语言包
    $this->loadLangPack($langSet);
    // 监听AppInit
    $this->event->trigger('AppInit');
    date_default_timezone_set($this->config->get('app.default_timezone', 'Asia/Shanghai'));
    // 初始化
    foreach ($this->initializers as $initializer) {
        $this->make($initializer)->init($this);
    }
    return $this;
}

public function register($service, bool $force = false)
{
    $registered = $this->getService($service);
    if ($registered && !$force) {
        return $registered;
    }
    if (is_string($service)) {
        $service = new $service($this);
    }
    if (method_exists($service, 'register')) {
        $service->register();
    }
    if (property_exists($service, 'bind')) {
        $this->bind($service->bind);
    }
    $this->services[] = $service;
}

foreach ($this->initializers as $initializer) {
        $this->make($initializer)->init($this);
}

think\initializer\BootService
think\initializer\Error
think\initializer\RegisterService

public function init(App $app)
{
    $file = $app->getRootPath() . 'runtime' . DIRECTORY_SEPARATOR . 'services.php';
    $services = $this->services;
    if (is_file($file)) {
        $services = array_merge($services, include $file);
    }
    foreach ($services as $service) {
        if (class_exists($service)) {
            $app->register($service);
        }
    }
}

"scripts": {
    "post-autoload-dump": [
        "@php think service:discover",
        "@php think vendor:publish"
    ]
}

PaginatorService::class,
ValidateService::class,
ModelService::class,

public function init(App $app)
{
    $app->boot();
}