IRLDb shows 4 roguelikes in Javascript, none in PHP. Also it shows one roguelike in Flash (which is a similar category to JS/PHP, so I thought it might be of interest in this topic), and I know of another one which is missing from Roguebasin:
http://www.thetombs.com/Creating a web-roguelike with server-side PHP scripts called through AJAX or something seems an original project (I guess it would be a multiplayer one, otherwise I don't see any sense) but also very tedious to implement, I think. (And also to play... when playing roguelikes on my computer, I often do several actions per second (even more if you are using auto-explore feature of DCSS and count each move as one...), and the network lags would not allow me to do that in a web-roguelike). Thus, I am not sure whether this would be practical.