catalog.php

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

// Configure OAuth2 access token for authorization: oauth2
SquareConnect\Configuration::getDefaultConfiguration()->setAccessToken('xxx');

$api_instance = new SquareConnect\Api\CatalogApi();
$body = new \SquareConnect\Model\UpsertCatalogObjectRequest(
	array("idempotency_key"=>uniqid(),
		"object"=>array(
			"type"=>"CATEGORY",
			"id"=>"#Drinks",
			"category_data"=>array(
				"name"=>"Drinks"
				)
			)
		)
	); 


try {
	$result = $api_instance->upsertCatalogObject($body);
	print_r($result);
} catch (Exception $e) {
	echo 'Exception when calling CatalogApi->upsertCatalogObject: ', $e->getMessage(), PHP_EOL;
}
?>