PHP-SDK for PostNord webservices. You need an API-key to use the service.
<?php
use PostNord\Request;
use PostNord\Client;
$request = new Request($apiKey);
$client = new Client($request);
$result = $client->findNearestByZipCode(7100);
Check out the full API for servicepoints, Track'n'Trace and Transit time.