1. Go to this page and download the library: Download fobia/php-object-collection 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/ */
fobia / php-object-collection example snippets
$oc->eq(); // Первый элемент
$oc->eq(0); // эквивалентно
$oc->eq(1); // Второй элемент