How to create a website about clicking a next turn number and send to my apps?

Question

I am doing a project about order a number online using apps. As a counter, I want to login to the website and then doing my work. I just click the next turn number and the next turn number will send to my apps so that the user of my apps can know what is the turn at the electric sign of the place.

Answer 1

public currentNum;
function generatedNum(){
currentNum =+1;
}

echo currentNum;

use webservice to interacting your web data to app data, or u can use realtime database like Firebase, good luck