Installer/behat/testScreenshot/tests/get.php

<?php 

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

include __DIR__ . '/vendor/autoload.php';

$client = new S3Client([
		'credentials' => [ 
				'key' => 'iksop', 
				'secret' => '8htoiwn44g204th' ], 
		'endpoint' => 'https://s3.infra.flowdat.com/minio/login',
		'use_path_style_endpoint' => true,
		'region' => 'sa-east-1',
		'version' => 'latest',]);

$adapter = new AwsS3Adapter($client, 'comparaciones');

$filesystem = new Filesystem($adapter);

$path = $_GET["path"];

if($filesystem->has($path)){
	header("Content-type:". $filesystem->getMimetype($path));
	$strm = $filesystem->readStream($path);

	echo stream_get_contents($strm);
}