<?php
require_once('/path/to/WhatsAPI/vendor/autoload.php');

<?php
require_once(__DIR__ . '/vendor/autoload.php');



// Configure API key authorization: ApiKeyAuth
$config = WhatsAPI\Configuration::getDefaultConfiguration()->setApiKey('Authorization', 'YOUR_API_KEY');
// Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
// $config = WhatsAPI\Configuration::getDefaultConfiguration()->setApiKeyPrefix('Authorization', 'Bearer');


$apiInstance = new WhatsAPI\Api\BusinessManagementApi(
    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
    // This is optional, `GuzzleHttp\Client` will be used as default.
    new GuzzleHttp\Client(),
    $config
);
$instance_key = 'instance_key_example'; // string | Instance key

try {
    $result = $apiInstance->fetchCatlog($instance_key);
    print_r($result);
} catch (Exception $e) {
    echo 'Exception when calling BusinessManagementApi->fetchCatlog: ', $e->getMessage(), PHP_EOL;
}