You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
🎯 PHP / ASP - Shell Backdoor List 🎯
PHP shells that work on Linux OS, macOS, and Windows OS.
Tiny PHP Web shell for executing unix commands from web page
A PHP Based Tool That Helps You To Manage All Your Backdoored Websites Efficiently.