关键字'use'如何在php（laravel）中工作

Question

I don't understand how does use keyword works in laravel framework

I create a controller PostsManagerController.php

this controller has a namespace App\\Http\\Controllers;

until here everything is fine the problem is in routes/web.php

i find this two lines

use App\Http\Controllers\PostsManagerController;

use Illuminate\Support\Facades\Route;

my question is how routes/web.php know the PostsManagerController class and Route class without import any of them

as I know if we want use or deal with a class in other file first we need to import it

Answer 1

in Laravel app there is a public folder . there is a file name index.php ..which require..

require __DIR__.'/../vendor/autoload.php';

Note index.php is the entry point of Laravel application

in vendor folder.. if you go there there is a file autoload.php

// autoload.php @generated by Composer

require_once __DIR__ . '/composer/autoload_real.php';

return ComposerAutoloaderInita990d9507b876ea05d2300077581f677::getLoader();

autoload.php file autoload all classes file...