Sample upload with limited account

test.php

<?php

require 'vendor/autoload.php';

use Aws\S3\S3Client;
use League\Flysystem\AwsS3v3\AwsS3Adapter;
use League\Flysystem\Filesystem;

$bucketName = 'YOUR_BUCKET';
$serviceConfig = [
    'region' => 'YOUR_REGION',
    'version' => 'latest',
    'credentials' => [
        'key'    => 'YOUR_KEY',
        'secret' => 'YOUR_SECRET',
    ]
];

$s3Client = new S3Client($serviceConfig);
$adapterInterface = new AwsS3Adapter($s3Client, $bucketName);
$fileSystem = new Filesystem($adapterInterface);

$destinationPath = uniqid('test_file_');
$fileSystem->put($destinationPath, "TEST DATA");


$destinationPath = uniqid('test_file_') . ".txt";
$fileSystem->put($destinationPath, "TEST DATA");