Get, list and delete objects from AWS S3 Bucket

As requirement, install the AWS SDK for PHP library to connect AWS S3.
First of all you need to connect to your AWS S3:

require 'vendor/autoload.php';
use Aws\S3\S3Client;
use Aws\Exception\AwsException;

$config =
[
    'version' => 'latest',
    'region' => '',
    'endpoint' => '[cluster-url]',
    'credentials' =>
    [
        'key' => '[access-key]',
        'secret' => '[secret-key]',
    ],
];

$client = new \Aws\S3\S3Client($config);

List objects:

$result = $client->listObjects([
    'Bucket' => 'bucket-name',
    'Prefix' => 'sub/directory/'
]);

foreach ($result['Contents'] as $key => $object) {
    // Is the value of prefix.
    if (0 === $key) {
        continue;
    }

    echo $object['Key'] . "<br>";
}

Get object:

$object = $client->getObject(array(
    'Bucket' => 'bucket-name',
    'Key'    => 'sub/directory/image.jpg'
));

Delete object:

$client->deleteObject([
    'Bucket' => 'bucket-name',
    'Key'    => 'sub/directory/image.jpg'
]);