<?php require 'vendor/autoload.php'; use LinkORB\Vultr\Vultr; function printReplyIfError($api, $res) { if ($res === false) { echo $api->code . "\n"; echo $api->reply . "\n"; } } $vultrApi = new Vultr("PUT_YOUR_API_KEY_HERE"); $api = $vultrApi->isoApi(); $res = $api->getList(); var_dump($res); printReplyIfError($api, $res);