The attached picture shows the results page of the search engine that I'm building. For each return result, the user may click on the result (i.e. "Food Science") and it will expand out accordion-style to reveal information about that particular result.

I want to log each time the user clicks on a result (for learning/intelligence purposes) and store it in a database table that I have created which stores the session ID, the query, the position of the result, and the order in which the user clicked the item.

Using JQuery, I already have a function that will pull the title of the result that was clicked, and I have it set where I want to log the click, but I don't know how to do it since JQuery is client side and PHP is server side.

How can I use the JQuery to trigger a PHP function so that I can query the database to insert the click logs into my table?

Below is the JQuery function.

$(document).ready(function() { 
    $('.accordionButton').click(function(e) {
        if($(this).next().is(':hidden') == true) {
            $(this).addClass('on');
            $(this).next().slideDown('normal');
            $(this).next().slideDown(test_accordion);
            // SEND CLICK ACTION TO LOG INTO THE DATABASE
            alert($(this).find('h3:last').text()); // displays the title of the result that was just clicked
         } 
         else {
            $(this).removeClass('on');
            $(this).next().slideUp('normal');
            $(this).next().slideUp(test_accordion);
         } 
     });
}

• php
• jquery
• database

You can do something like this (untested):

Define a javascript variable to track the order of the clicks, outside your click function:

var order = 0;

Add this into your click function, at the bottom:

order++;
var sessionID = $("input[name='sessionID']").val();  // assuming you have sessionID as the value of a hidden input
var query = $("#query").text();    // if 'query' is the id of your searchbox
var pos = $(this).index() + 1;     // might have to modify this to get correct index
$.post("logClick.php", {sessionID:sessionID, query:query, pos:pos, order:order});

In your php script called "logClick.php" (in the same directory):

<?php
    // GET AJAX POSTED DATA
    $str_sessionID = empty($_POST["sessionID"]) ? '' ; $_POST["sessionID"];
    $str_query = empty($_POST["query"]) ? '' ; $_POST["query"];
    $int_pos = empty($_POST["pos"]) ? 1 ; (int)$_POST["pos"];
    $int_order = empty($_POST["order"]) ? 1 ; (int)$_POST["order"];

    // CONNECT TO DATABASE
    if ($str_sessionID && $str_query) {
        require_once "dbconnect.php";    // include the commands used to connect to your database. Should define a variable $con as the mysql connection

        // INSERT INTO MYSQL DATABASE TABLE CALLED 'click_logs'
        $sql_query = "INSERT INTO click_logs (sessionID, query, pos, order) VALUES ('$str_sessionID', '$str_query', $int_pos, $int_order)";
        $res = mysql_query($sql_query, $con);
        if (!$res) die('Could not connect: ' . mysql_error());
        else echo "Click was logged.";
    }
    else echo "No data found to log!";
?>

You can add a callback function as a third parameter for the $.post() ajax method if you want to see if errors occured in the script:

$.post("logClick.php", {sessionID:sessionID, query:query, pos:pos, order:order},
    function(result) {
      $('#result').html(result);  // display script output into a div with id='result'
      // or just alert(result);
    })
);

EDIT: If you need the value of the order variable to persist between page loads because you paginated your results, then you can pas the value of this variable between pages using either GET or POST. You can then save the value in a hidden input and easily read it with jQuery. (Or you could also use cookies).

Example (put this in every results page):

<?php
   $order = empty($_POST["order"]) ? $_POST["order"] : "0";
   $html="<form id='form_session' action='' name='form_session' method='POST'>
        <input type='hidden' name='order' value='$order'>
    </form>\n";
   echo $html;
?>

In your jQuery, just change var order = 0; to

var order = $("input[name='order']").val();

Then, when a user clicks on a page link, prevent the default link action, set the order value and the form action, and then submit the form using javascript/jQuery:

$("a.next_page").click(function(event) {
  event.preventDefault();
  var url = $(this).attr("href");
  $("input[name='order']").val(order);
  $("#form_session").attr('action', url).submit();
});

All the 'next' and 'previous' pagination links must be given the same class (namely 'next_page' (in this example).

EDIT: If your pagination is as follows:

<div class='pagination'>
    <ul><li><a href='page1.url'>1</a></li>
        <li><a href='page2.url'>2</a></li>
    </ul>
</div>

then just change this:

$("div.pagination a").click(function(event) {
etc.

Send a request to a PHP page using jQuery AJAX. See here for more info (it is really simple):

http://api.jquery.com/jQuery.ajax/

In this particular case, as you do not need to return anything, it may be better to just use the POST or GET methods in jQuery:

http://api.jquery.com/jQuery.post/ http://api.jquery.com/jQuery.get/

Something like:

$.ajax({
  type: "POST",
  url: "some.php",
  data: "name=John&location=Boston"
  success: function(data){
     alert('done');
});

This one is pretty easy, you need a PHP-Script to handle AJAX requests which are sent from your Search page.

In your search page you'll need to add an .ajax to create an AJAX request to your Script. Everything you need to know about AJAX can be found here: http://api.jquery.com/jQuery.ajax/

In your PHP-Script you'll handle the Database action, use GET or POST data to give the script an ID over Ajax.

Use Ajax. Write a simple php-script that writes clickes to the database. I don't know how you log the clicks in the database exactly, but you can send the clicked item unique identifier to a php script with ajax, for example via POST variables.

A little example, on click:

$.post(
'count_click.php', 
{ id: "someid" },
function(data) {
// data = everything the php-script prints out
});

Php:

if (isset($_POST['id'])) {
// add a click in the database with this id
}