A very simple, light weight PHP client for validating EU VAT numbers against the central europa.eu database.
Here's a very simple example of this client in action:
$vat_number = '123 4567 89'; // The VAT number you wish to lookup
$country_code = 'GB';
$details = (new vatRegistration)->checkVat($vat_number, $country_code);
var_dump($details)