Question How to detect player disconnect or leave the game?

This is 2 players multiplayer game kind of like tic tac toe and multiplayer network I have used Photon.

As per my question is mentioning, I want to detect the callback in two situations when the player is leaving the game by choice and player gets disconnected through break down of connection.

For internet connection lose I don't have any event but I want to inform other player that opponent player is not in the game now.

For player who want to leave the game by choice, for this I have placed main menu button within the gameplay screen.

What to write in the main menu click event?

My current scene structure of the game:

 

You could use :

Code (CSharp):

1. OnPlayerLeftRoom (Player otherPlayer)

This code will execute every time a player has left the room, and the parameter 'otherPlayer' is a reference to the player who left.

If you have a netmanager or something that's calling the OnConnectedToMaster/OnJoinRoom/OnCreateRoom functions, I would put it there. You could raise an event or RPC to let other clients know about the player leaving, and just load a scene on the client who clicked the leave button. Hope that made sense!

Edit:
Assuming it is already, but for redundancy, make sure the class calling this inherits from MonoBehaviourPunCallbacks!