well I've made a 4 player PHP game and i have it posted on my server right now. although it doesn't exactly do everything you've posted, but this wouldn't be a problem because it's meant for up to 4 people to play on the very same computer. The game itself is not very fascinating since it is just only a school project, but nevertheless it got us pretty good marks. We used Mysql to store our game data and we have also built our own anti-cheat system.
here's the link to our game
click here
PS: I have a group formed with my friends to try to explore into using PHP to create web games and other developments. If during the summer you're interested in joining us you can. Please contact me @
murdoc2k@gmail.com