Get Fatal error when installing slim 3 framework - php

Question

I was installing slim 3 according to Slim Documentation.After installing i have created index.php file.Given below:
index.php:
<?php
require 'vendor/autoload.php';
$app = new Slim\App();
$app->get('/hello/{name}', function ($request, $response, $args) {
$response->write("Hello, " . $args['name']);
return $response;
});
$app->run();
But when i run the application in http://localhost:8000 then i get a fatal error.I have searched and get some solution in stackoverflow.Those are:
PHP Fatal error: Class 'Slim' not found - Slim Framework 3
PHP Fatal error: Class 'Slim' not found
Composer autoloader + slim framework - fatal error: Class 'Slim\Slim' not found?
But those solution does not solve my problem.Have any specific solution of it?
ERROR:
Fatal error: Class 'Slim\App' not found in
C:\xampp\htdocs\api\index.php on line 5
And my directory format:
UPDATED:
vendor/autoload.php:
<?php
// autoload.php #generated by Composer
require_once __DIR__ . '/composer' . '/autoload_real.php';
return ComposerAutoloaderInit98cfb2e091de2f633f87c81d16402aec::getLoader();
vendor forlder:

Answer 1

The problem is that you have downloaded and extracted Slim manually into htdocs\api\Slim.
It wasn't fetched by Composer, then it would reside in the vendor folder (vendor/slim/slim) and the autoload would work automatically.
Add Slim to your composer.json and run composer install again:
{
"require": {
"slim/slim": "^3.0"
}
}
You already require the Composer Autoloader, so the depenendency should be found and loaded after it was fetched.
Referencing: http://docs.slimframework.com/start/get-started/