Webhook and php

Hello,
I am working on cards game,other game logic is done but for disconnect by server,timout and rejoin.-player session management work remaining. Turnbased demo is very good for storing and fatching room data.
I want to develop webhooks in php,because my other services in php and i have no idea how to create and manage webhooks in php and assign in photon server settings.

Please give me some information or demo for this.

Thanks in advance...