composer require hapio/hapio-sdk-php

// Require the Composer autoloader
require __DIR__ . '/vendor/autoload.php';

use Hapio\Sdk\ApiClient;

// Instantiate a Hapio API client
$apiClient = new ApiClient('your-api-token');

// Get a list of all bookings this week
$response = $apiClient->bookings()->list([
    'from' => new DateTime('monday this week 00:00:00'),
    'to' => new DateTime('friday this week 23:59:59'),
]);

while ($response) {
    foreach ($response->getItems() as $booking) {
        var_dump($booking);
    }

    if ($response->hasMoreItems()) {
        $response = $response->getNextPage();
    } else {
        $response = null;
    }
}