I don’t understand how to connect the library through composer?

Question

PHP

I'm starting to get acquainted with composer and trying to connect the library. I loaded the composer require php-ds/php-ds package via composer , created a file in src, included autoload

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

use DS\Stack;

$a = new Stack();

writes the error Uncaught Error: Class 'DS\Stack' not found
composer dump-autoload --optimize wrote
... what's wrong?
json

{
    "require": {
        "php-ds/php-ds": "^1.2"
    }
}

Answer 1

try use \DS\Stack