You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
BrowserQuest server in PHP base on workerman. A PHP/HTML5/JavaScript multiplayer game experiment.
walkor🚀 An open source multiplayer space strategy game.
galaxyofdronesA text-based, persistent browser-based strategy game (PBBG) in a fantasy war setting
OpenDominionsee how much does it cost to buy all steam games
cwang22A very simple Flappy Bird-like game written in PHP, built on PHP-GLFW and the VISU framework.
phpgl