Class not found exception in PHP from composer - php

Question

I am trying to include a package from composer, but I am receiving a class not found error.
I have tried the below possibilities.
$supermeteor = new \Supermeteor\Supermeteor('XXXXXXXX');
and
use Supermeteor\Supermeteor;
$supermeteor = new Supermeteor('xxxxxxxx');
Packages composer.json:
"psr-4": {
"Supermeteor\\": ""
}
Packages namespace :
namespace Supermeteor;
Packages class name :
class Supermeteor() {}
Error message
Uncaught Error: Class 'Supermeteor\Supermeteor' not found in
C:\path\to\my\file.php:16

Answer 1

I just tested your package locally, and it seems to work fine for me using the same code as you provided in your question. This is how I tested it.
1. Create a new project
Create a new directory on your computer.
2. Add the package to a new project using Composer
Locate your new directory on the command line and add the package to your projects autoloader by running the below composer command.
composer require supermeteor/sdk-php
3. Use the package
Create an index.php file in the same directory as your composer.json and add the below code.
<?php
require_once __DIR__ . '/vendor/autoload.php';
use Supermeteor\Supermeteor;
$supermeteor = new Supermeteor("xxx");
4. Test the results
In the terminal window start a new php server to serve your project.
php -S localhost:8089
Now access the site via your browser at http://localhost:8089.