How to use socket in php project?

Question

PHP

There is a project in php, a regular site. You need to add a block with sports matches and their odds.
Found api, everything is fine, but how to make everything updated in live mode?
Previously, I worked only with Ajax and it only occurs to me to send an Ajax request to the server every 5 seconds.
Please advise how to be in this situation, what technology or bundle to use?

Answer 1

https://github.com/centrifugal/centrifugal

Answer 2

Server sent event - but not supported in ie/edge
https://learn.javascript.ru/server-sent-events
https://www.npmjs.com/package/event-source-polyfill

Answer 3

Why do you need realtime so realtime?
Ajax is enough.
Well, let’s check that the odds have changed since the page was loaded and when you try to bet with the old odds.

Answer 4

There are two options:
1. setTimeout, setInterval
2. Websocket