<?php
use Appwrite\Client;
use Appwrite\Services\Account;
$client = (new Client())
->setEndpoint('https://<REGION>.cloud.appwrite.io/v1') // Your API Endpoint
->setProject('<YOUR_PROJECT_ID>') // Your project ID
->setSession(''); // The user session to authenticate with
$account = new Account($client);
$result = $account->createAnonymousSession();