GuzzleTest.php

<?php

$client = new \GuzzleHttp\Client();
$request = $client->createRequest('GET', 'https://beta.check-mot.service.gov.uk');
$request->addHeader('x-api-key', 'MY API KEY');

try {
	$resp = $client->send($request);
} catch (GuzzleHttp\Exception\ClientException $e) {
	$resp = $e->getResponse();
}

echo $resp;

Hi Anthony Im still getting the Type error: Argument 3 passed to GuzzleHttp\Client::request() must be of the type array, string given, called in /home/web/APIprojecttest/project/vendor/guzzlehttp/guzzle/src/Client.php on line 89, Could it be im missing a package or something?

What version of Guzzle are you testing this with?

Still the same issue? Could it be due to my pc settings or operating system?

6 I believe

It's because you are using createRequest, which Guzzle 6 isn't friendly with. This gist works fine in Guzzle 5.3, but has the same error you are seeing when run on Guzzle 6. Check out this gist, which I wrote for Guzzle 6 (and basically is the same as your first example in your SO question, but trimmed down) : https://gist.github.com/crazytonyi/10222135ab7b4d9407d2103130a94cfa