angularjs - Is it possible to build real-time application using PHP , Socket.io and javascript only? -

lately, have been doing lot of research (of course googling :p) on building real-time application (like chat application). far have come across elephant.io, socket.io , ratchet. , of terms stumbled upon web-sockets, bi-directional communication etc..

i building auction site involves countdown timer. trying achieve when 1 user bids, timer gets updated in client's browser without page refresh (something server broadcasting change of event other connected users).

the problem is, building application php (pyro-cms). server, uploaded apache-based server , not support node.js. 1 of common stuff notice of real-time applications utilizing node.js.

is possible build real-time application using php , socket.io , javascript only? or may angular.js?

i cannot use server support node.js have rely on apache server. dont know if possible. if there resources, reference or tutorial, helpful.