downloadS3ToByte.php

<?php	
/**
 * @jeffotoni
 * aws sdk download
 * baixar o sdk pelo composer 
 * install composer curl -sS https://getcomposer.org/installer | php
 * gerar o arquivo composer.json
 * "require": {"aws/aws-sdk-php": "2.*"}
 * composer update
 */

require_once 'vendor/autoload.php';

use \Aws\S3\S3Client;

$key 		  = "xxxxxxxxx";
$secret 	= "xxxxxxxx";
$bucket 	= "nome do seu bucket";
$version 	= "latest";
$region 	= "us-east-1";

$dirfile_bucket = "diretorio/file.mp3"; ///diretorio no bucket com file ou somente file
$range  		= "bytes=0-3024"; //quantidade de bytes que deseja pegar, range de bytes

$filepath 		= "diretorio onde ira baixar o file"; # /tmp/file-part1.mp3

$credencials = 
			[
                'version' 		=> $version,
                'region' 		=> $region,
                'credentials' 	=> 
                [
                    'key' 		=> trim($key),
                    'secret' 	=> trim($secret),
                ]
            ];  

 $s3 = \Aws\S3\S3Client::factory($credencials);

// Get a range of bytes from an object.
$command = $s3->getObject(array(
    'Bucket' => $bucket,
    'Key'    => $dirfile_bucket,
    'Range'  => $range,
    'SaveAs' => $filepath
));

print_r($command);