how to set up composer package with packagist

I am trying to set up a composer package but i cannot seem to get it to load when i try it from a new project

my package is here https://github.com/shorif2000/pagination and the packgist is here https://packagist.org/packages/shorif2000/pagination

in a new project i have

{
    "name": "ec2-user/pagination",
    "authors": [
        {
            "name": "shorif2000",
            "email": "shorif2000@gmail.com"
        }
    ],
    "require": {
        "shorif2000/pagination": "dev-master"
    },
    "minimum-stability" : "dev"
}

$ cat index.php
<?php

require './vendor/autoload.php';

use Pagination\Paginator;

$totalItems = 1000;
$itemsPerPage = 50;
$currentPage = 8;
$urlPattern = '/foo/page/(:num)';

$paginator = new Paginator($totalItems, $itemsPerPage, $currentPage, $urlPattern);

?>
<html>
  <head>
    <!-- The default, built-in template supports the Twitter Bootstrap pagination styles. -->
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
  </head>
  <body>

    <?php
      // Example of rendering the pagination control with the built-in template.
      // See below for information about using other templates or custom rendering.

      echo $paginator;
    ?>

  </body>
</html>

it fails with error Fatal error: Uncaught Error: Class 'Pagination\Paginator' not found in /opt/pagination/index.php:12 Stack trace: #0 {main} thrown in /opt/pagination/index.php on line 12. I tried use shorif2000\Pagination\Paginator; which gave same error as well

Solution

There's more than one issue here.

composer.json (package)

In your composer file (for the Pagination library), change PSR-0 to PSR-4. PSR-0 is an old format that was deprecated around 5 years ago (2014).

Namespaces

Since you're namespace is Pagination\, that's the namespace you should use in the code that uses it.

So if you have a class with:

namespace Pagination;

class Pagination {
    ...
}

then your use statement should simply be:

use Pagination\Pagination;