<?php

$user = 'Your Billbee username';
$apiPassword = 'Your Billbee API Password'; // https://app.billbee.io/de/settings/api
$apiKey = 'Your Billbee API Key';

$client = new \BillbeeDe\BillbeeAPI\Client($user, $apiPassword, $apiKey);

<?php
 
$user = 'Your Billbee username';
$apiPassword = 'Your Billbee API Password'; // https://app.billbee.io/de/settings/api
$apiKey = 'Your Billbee API Key';
 
$client = new \BillbeeDe\BillbeeAPI\Client($user, $apiPassword, $apiKey);

/** @var \BillbeeDe\BillbeeAPI\Response\GetProductsResponse $productsResponse */
$productsResponse = $client->getProducts($page = 1, $pageSize = 10);
 
/** @var \BillbeeDe\BillbeeAPI\Model\Product $product */
foreach ($productsResponse->data as $product) {
    echo sprintf("Id: %s, SKU: %s, Price: %f\n", $product->id, $product->sku, $product->price);
}

<?php

$user = 'Your Billbee username';
$apiPassword = 'Your Billbee API Password'; // https://app.billbee.io/de/settings/api
$apiKey = 'Your Billbee API Key';
 
$client = new \BillbeeDe\BillbeeAPI\Client($user, $apiPassword, $apiKey);
$client->useBatching = true; # Enable batching
 
$client->getProducts(1, 1); # Adds the request to the batch pool / returns null
$client->getOrders(1, 1); # Adds the request to the batch pool / returns null
$client->getEvents(1, 1); # Adds the request to the batch pool / returns null
 
$results = $client->executeBatch(); # Results contain all responses in the added order
 
/** @var \BillbeeDe\BillbeeAPI\Response\GetProductsResponse $productsResult */
$productsResult = $results[0];
 
/** @var \BillbeeDe\BillbeeAPI\Response\GetOrdersResponse $ordersResult */
$ordersResult = $results[1];
 
/** @var \BillbeeDe\BillbeeAPI\Response\GetEventsResponse $eventsResult */
$eventsResult = $results[2];