Sendig information from a div

[tomposka]

Hello

I am just planning a home page, and I did hit a problem. There are many class in the page, and I'm using AJAX for one of them to send / recieve informations from the server in every seconds.

The main reason is for using a different div for this, I don't want to refresh the whole home page, because it would be unuseable.

What I want to do with this div, when there is a little changing in the database, I want to reload the whole homepage automatically, to let that handle the changing, but I cannot control this from that div.

I tried the javascript method refresh(), and also I tried the HTML refresh meta-tag, without any fortune (the html tag worked only in chrome, but not in firefox)

I want to ask about is there any way to the page to reload when it changes (because ajax that div in the page is always changing)?

Thanks,
tomposka

[ScottyBoy]

The following code was written on the fly, right into the post, so I make no promises that it works "as is". However, the concept is there, so it should still be semi-useful. It is also dependent on the JavaScript library jQuery, so if that isn't included, it won't work.

Basically what this does, is compare the post title contained in the <h2> with the one stored in the database. If the titles are different, then the PHP code sends updated data to the JavaScript, which populates the existing <div> with the updated information. Again, not really the best way, but I'm just trying to show a concept here.

<div id="current_info">
    <h2 class="post_title">Post Title</h2>
    <p>Couple random paragraphs #1</p>
    <p>Couple random paragraphs #2</p>
    <p>Couple random paragraphs #3</p>
    <p>Couple random paragraphs #4</p>
</div>

A javascript BBC would be really useful right about now.

$(document).ready(function()
{
    // setInterval repeats the provided function until clearInterval() is called.
    setInterval(function()
    {
        // jQuery AJAX FTW!
        $.ajax({
            url: 'process.php',
            type: 'post',
            data: {oldTitle: $('#current_info h2.post_title').text()},
            dataType: 'json',
            success: function(response)
            {
                // If there's nothing coming back, then something is wrong.
                if (!response)
                    return false;

                // If the post is new (updated) keep going.
                // response.status will be 'current' if the post is not updated.
                if (response.status == 'updated')
                {
                    // Clear the old post.
                    $('#current_info').html('');
                    // Add the title.
                    $('#current_info').append('<h2>' + response.title + '</h2>');
                    // Add the post content.
                    $('#current_info').append(response.post);
                    // Success!
                    return true;
                }
                // This would most likely be the response 'current'.
                else
                    return false;
            }
        });
    }, 10000); // Repeat this every ten seconds.
});

This is 'process.php', assumed to be in the same directory as the html. You can change the name of the script and its location here $.ajax({ url: })

<?php

// Get some stuff from the database, and make sure it's sanitized!
$result = $database_result;

// The post displayed on the page matches the one in the database. Forget it.
if ($_POST['oldTitle'] == $result['title'])
    $updated['status'] = 'current';

// Format the return data.
$updated = array(
    'status' => 'updated',
    'title' => $result['title'],
    'post' => $result['post']
);

// Send it back to the JavaScript.
echo json_encode($updated);

That should about do it. Good luck.