WebRTC and PHP Expert

I am looking for webrtc and PHP expert for a one-to-one video and audio call solution.
Requirement:
1) Track call duration
2) One to One audio (If the user selects audio so the user will not able to start the video call)
3) One to one Video call
4) Call duration depends on the set duration in the backend. Once that duration was completed call should be automatic disconnected.

Please share example project and add text in your proposal “WEBRTC and PHP Developer”