title: post ajax data to PHP and return data
body: <p>How can i post some ajax data to the controller function and get it back? For I want to post one integer to the function, and get another integer (total votes for the item which ID is posted), and on success i want to echo that vote count.
  I dont know how can i post the "id" to the controller function.  Please see my code:</p>
  
  <pre><code>//post this integet
  the_id = $(this).attr('id'); 
  
          $.ajax({
              type: "POST",
              data: the_id,
              url: "http://localhost/test/index.php/data/count_votes",
              success: function(){
                  //the controller function count_votes returns an integer.
                  //echo that with the fade in here.
  
                  }
              });
  </code></pre>