I'm trying to do something that shouldn't be too hard but I'm struggling with it.

I need to send a request to an API and get the response. I've been on with this all weekend so any help is greatly appreciated.

This is the code I'm trying.

<?php

$password = 'passwordhere';
$productCode = 'ITEMCODEHERE';
$userName = 'USERNAMEHERE';

$xmlParameters = "password=$password&productCode=productCode";

$client = new SoapClient('https://api.domain.com/');

$res = $client->GetImagesforProduct($userName,$xmlParameters);

$contentString = $res->contentString;

print($contentString);

?>