ZF2 UID Validation

UID.php

<?php
namespace cwdCommon\Validator;

use Zend\Validator\AbstractValidator;

class UID extends AbstractValidator
{
    const INVALID = 'invalid';
    const OTHER = 'other';

    protected $messageTemplates = array(
            self::INVALID => "'%value%' is not a valid UID in the European Union",
            self::OTHER => 'checkVatService is currently not reachable'
    );

    public function isValid($value)
    {
        $this->setValue($value);

        $cc = substr($value, 0, 2);
        $vn = substr($value, 2);

        try{
            //$client = new \SoapClient("http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl");
            $client = new \SoapClient("data/checkVatService.wsdl");
            if($client) {
                $params = array('countryCode' => $cc, 'vatNumber' => $vn);
                $result = $client->checkVat($params);
                if($result->valid) {
                    return true;
                }else{
                    $this->error(self::INVALID);
                    return false;
                }
            }
        }catch(\SoapFault $e) {
            $this->error(self::OTHER);
            //echo $e->faultstring;
        }catch(\Exception $e) {
            $this->error(self::OTHER);
            //echo $e->getMessage();
        }

        return false;
    }
}