PHP Backboor by ZeroByte.ID (For Educational Purposes Only).
A standalone PHP backdoor for use on *nix and Windows systems.
Non-Official Repo For Web Backdoor Compilation
PHP / ASP - Shell Backdoor List
A collection of PHP backdoors. For educational or testing purposes only.
Backdoor is a standalone browser based code editor that operates on a LASP (Linux, Apache, SQLite, PHP) server, providing all basic development tools and more.