Please kindly explain this code to me about tus-php HOT 1 OPEN

The $s3Client->registerStreamWrapper() line registers the Amazon S3 stream wrapper, which allows you to use Amazon S3 buckets as a file system. This means you can use file system functions like fopen(), file_get_contents(), etc., with Amazon S3 paths (e.g., s3://your-bucket-name/file.txt).

When you call $server->setUploadDir($basePath), you're setting the upload directory to the S3 bucket path. The Tus server will use this path to store the uploaded files.

Under the hood, when the Tus server receives an upload request and saves the file using the S3 path, the registered stream wrapper intercepts the file system operations and translates them into the appropriate Amazon S3 API calls using the $s3Client instance. This is how the file gets transferred to the S3 storage.

So, even though $s3Client is not explicitly used in the Server() constructor or setUploadDir() method, it's still being utilized by the stream wrapper to handle the file upload to S3.

The code looks complete to me. As long as you have provided the correct AWS access key, secret key, region, and bucket name, it should work as expected.

from tus-php.