Question

What would be the easiest way to update a HTML tag with the following php code?

<h1>
 <?php
    include "document.txt";
    ?>
    </h1>

What I mean is like a timed update… every 10 second or every 2 seconds.

Answer 1

Take a look at AJAX. jQuery has a really easy to use function to make AJAX requests, see jQuery.ajax().

This example (modified from the jQuery page) is what you want:

function loadData() {
    $.ajax({
      url: "document.txt",
      cache: false
    }).done(function( html ) {
      $("#results").html(html);
    });
}

It’ll get the contents of the document.txt file and add it to an element with the attribute id="results" like the following:

<h1 id="results"></h1>

You can then use window.setInterval to execute the code at a set interval.

window.setInterval(loadData, 10000);