<?php
$resp = '{"result":"SUCCESS","code":"3003","message":"Congratulations! You have been registered successfully to Wowcher.","data":{"alias":null,"tags":null,"apiLocationsVO":null,"apiAddressReferencesVO":null,"apiAddressVO":null,"apiDealsVO":null,"apiMultiLocationDealsVO":null,"apiDealVO":null,"apiFeaturedDealVO":null,"apiDealStatusVO":null,"apiRequestPurchase":null,"apiSubscriptionVO":null,"apiUserDealInfoVO":null,"isNewEmail":false,"apiAuthToken":null,"facebookStatus":null,"subscriptionsCount":"4","paypalDirectEnabled":null},"fieldErrors":null}';
$responseArray = json_decode($body, true);
var_dump($responseArray['data']['isNewEmail']);