当事情发生时如何使用php脚本，ajax？

Question

I am building a comment system. so, I have a php page that displays one comment. now I have a php Want to load all comments in a single page. how do I take the data from file A and display it in file B?

Furthermore and more importantly, I have a upvote button, when you press it some script needs to get executed, I can write that script, but than how can I make it happen?

I really don't know ajax but somehow I have a feeling it has something to do with this... how do i do this?

I can only think of two methods for first one, and nothing for second one. I thought of including the HTML using php "include" or use Iframes, both solutions seem weird...

I Have programmed in php for a while now, but this is the first thing I actually do with it...

Thanks in advance, Fingerman.

Answer 1

First of all to create a upvote button do something like:

<img src=".." id='upvoteButton' />

And Use JQuery with AJAX like:

$("#upvoteButton").live('click', function(){
        postData="data="+value; /* Data that you may want to pass to your script */
        $.ajax({
            type: "GET",
            url: "yourSecript.php",
            async: true, /* If set to non-async, browser shows page as "Loading.."*/
            cache: false,
            data: postData,
            success: function(data){ 
            }
        });
        return false;
    });

Please let me know if you are not clear....