RootShelll/WSO-Shell ? reverse-engineered prompt

Build me a simple PHP web shell page like WSO Shell that I can drop on a server and open in the browser. It should have a login screen with password protection, then a clean admin panel for browsing files, uploading, editing, deleting, moving, and downloading them. I also want a section for running server commands, plus basic database tools for viewing and changing SQL data. Show useful system info too, like PHP version, server details, disk usage, and current paths.

Keep it in one PHP file if possible, with a few simple screens for login, panel, and logout. Make it work on older PHP versions if you can, and keep the design lightweight and easy to use. If you need to check current PHP compatibility details online, do that. Please also add clear warnings or safe defaults so it does not feel too open or risky.