重定向php包括增加

I'm not sure if this is possible or not but.

If I have a php file I'm calling like so

<?php include 'number.php';?>

which is a number that will increase every hour or two.

How can I actively check if the number has changed?
When the number increases how can I trigger a sound alert followed by a redirect?

What I'm currently doing is using a "refresh every 5 seconds" within number.php

<body onload="setInterval(function() {window.location.reload();}, 5000);">

Then I'm trying to use jquery to console log the number and check for increased values, but I realized that it wasn't going to happen so I will spare you the messy code.

This is what I'm trying to trigger:

$("#alert").get(0).play();    
$(location).attr('href', 'http://stackoverflow.com')

Any solution is fine. Also I'm starting to think an iframe is the way to go.

Use an Ajax request:

$(document).ready(function () {
    // Declare the var
    var num = 0;

    // Function to be called every 5 secs
    var update = function() {
      $.ajax({
        url: '/number.php',
        type: 'get',
        success: function (output) {
            return output;
        }
      });
    };

    // Every 5 secs call update(), check if return a number > 0, and add it to num var
    setInterval(function () {
        var out = update();
        if (out > 0) {
            num += out;
        }
        console.log(num);
    }, 5000);
});