1. Go to this page and download the library: Download eberfreitas/correios library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
eberfreitas / correios example snippets
php
$correios = new Correios\Correios();
php
$adaptador = new MinhaClasseHttp;
$correios = new Correios\Correios([
'usuario' => 'joao',
'senha' => 'segredo',
'http_adapter' => $adaptador
]);