I'm developing an application in which users can send reports to the admins and the admin has a web panel from where he can check the reports from the users. So I need real-time notifications between my mobile app and website so what do I need to do? I searched about it and found the web socket server as the solution for my problem but I'm quite confused that from where I should start. I'm using MySQL database with PHP as a backend language for creating APIs for my mobile app and also a retrofit library to build the connection with a database.
I didn't try out anything for this because I don't know how I'll start.