Presign URLs

You may "presign" all requests with the $client->presign() function. It will return a URL that is safe to share to anyone. The URL contains encrypted authentication parameters.

This feature can be used if you want to give a user access to a file on S3 but only for a limited time.

use AsyncAws\S3\Input\GetObjectRequest;
use AsyncAws\S3\S3Client;

$s3 = new S3Client();
$input = new GetObjectRequest([
    'Bucket' => 'my-bucket',
    'Key' => 'test',
]);

$url = $s3->presign($input, new \DateTimeImmutable('+60 min'));

echo $url;

Note: AWS has limitations on the expiration length. Read more in the docs.