Fork of Project Send to add more features, security, responsive ui, flattened ui and anonymous sends. There is also single sign on, social media authentication and custom branding. This is a managed file transfer system...large file attachment system to send files up to 2 gigs to another person or group.
https://docs.php.earth/faq/misc/structure/
https://www.ictshore.com/php/php-project-structure/
There are a lot of files in root that should have been in the proper folders
be sure files that are not needed are deleted