Delete object using v3 ASK PHP SDK - php

Question

I'm having trouble logging in:
require 'aws-autoloader.php';
$client = new Aws\S3\S3Client([
'version' => 'latest',
'region' => REGION,
'endpoint' => HOST,
'credentials' => [
'key' => AWS_KEY,
'secret' => AWS_SECRET_KEY,
],
]);
$result = $client->deleteObject(array(
'Bucket' => $BucketName,
'Key' => $FileKey,
));
The $client object is never created. If I run it without the credentials it creates the $client. The Amazon docs say this is how to hardcode credentials. The docs have varying examples from previous sdk's which is really confusing. What's the correct way for deleting an object from V3? I'm not using composer if that matters.
UPDATE
The code works but the endpoint value is causing issues. if I use http://bucket.s3.amazonaws.com/ as the host it tries to fetch http://bucket.bucket.s3.amazonaws.com/key and throws a 404 not found, if i change it to http://s3.amazonaws.com it doesn't work at all, if I remove the host it tries fetching http://s3.amazonaws.com/bucket/key which gives a 204 status message and the deletemarker is still false and the file isn't deleted. I dunno how to make deleteObject create the correct effectiveuri in the result. I dunno what the 204 status means.
SOLUTION
The code works fine without the endpoint field. I hadn't put DELETE as allowed in the S3 CORRS. It works now.
require 'aws-autoloader.php';
$client = new Aws\S3\S3Client([
'version' => 'latest',
'region' => REGION,
'credentials' => [
'key' => AWS_KEY,
'secret' => AWS_SECRET_KEY,
],
]);
$result = $client->deleteObject(array(
'Bucket' => $BucketName,
'Key' => $FileKey,
));