Errors are properly handled. Asynchronous design pattern to improver UX. Fetch Api was used to allow faster upload. Each file is sends a different request to a server, the benefit of this is that, the ...
The S3.php file is taken from https://github.com/tpyo/amazon-s3-php-class. No need to download sdk. In the upload.php file you will get the code to upload any file to ...