Ajax star rating bar

[eluser]wiredesignz[/eluser]
Create application/controllers/ratings_rpc.php

Code:

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

class Ratings_rpc extends Controller
{
    function Ratings_rpc()
    {
        parent::Controller();
        $this->load->model('ratings_model');
        
        $this->output->set_header("Cache-Control: no-cache");
        $this->output->set_header("Pragma: nocache");
    }
    
    function index()
    {
        //get the values
        $vote_sent  = preg_replace("/[^0-9]/", "", $this->input->get('j'));
        $id_sent    = preg_replace("/[^0-9a-zA-Z]/", "", $this->input->get('q'));
        $ip_num     = preg_replace("/(^0-9\.)/", "", $this->input->get('t'));
        $units      = preg_replace("/(^0-9)/", "", $this->input->get('c'));
        $ip         = $this->input->ip_address();
        
        //added detection for javascript being disabled
        $nojs = preg_replace("/(^0-1)/", "", $this->input->get('r'));

        // kill the script because normal users will never see this.
        if ($vote_sent > $units) die("Sorry, vote appears to be invalid.");
        
        //default values
        $checkIP = NULL;
        $count = 0;
        $current_rating = 0;
        $sum = 0;
        $tense = "votes"; // 0 votes
        
        //get the current values!
        if ($numbers = $this->ratings_model->findBy_id($id_sent))
        {
            $checkIP = unserialize($numbers['used_ips']);
            $count = $numbers['total_votes']; //how many votes total
            $current_rating = $numbers['total_value']; //total number of rating
            $sum = $vote_sent + $current_rating; // add together the current vote value and the total vote value
            $tense = ($count == 1) ? "vote" : "votes"; //plural form votes/vote
        }
        
        // checking to see if the first vote has been tallied or increment the current number of votes
        ($sum == 0 ? $added = 0 : $added = $count + 1);
        
        // if it is an array i.e. already has entries the push in another value
        (is_array($checkIP) ? array_push($checkIP, $ip_num) : $checkIP = array($ip_num));
        
        //if the user hasn't yet voted, then vote normally...
        if ($this->ratings_model->countBy_ip($ip, $id_sent) == 0)
        {            
            //make sure vote is valid and IP matches - no monkey business!
            if ($vote_sent > 0 && $ip == $ip_num)
            {
                $this->ratings_model->updateBy_id($id_sent, array(
                    'total_votes' => $added,
                    'total_value' => $sum,
                    'used_ips'    => serialize($checkIP),
                ));
            }
        }
        
        //get the new values!
        if ($numbers = $this->ratings_model->findBy_id($id_sent))
        {
            $checkIP = unserialize($numbers['used_ips']);
            $count = $numbers['total_votes']; //how many votes total
            $current_rating = $numbers['total_value']; //total number of rating
            $tense = ($count == 1) ? "vote" : "votes"; //plural form votes/vote
        }    
        
        $data = array(
            'id_sent' => $id_sent,
            'current_rating' => $current_rating,
            'count' => $count,
            'sum'   => $sum,
            'added' => $added,
            'units' => $units,
            'tense' => $tense,
            'rating_unitwidth' => $this->config->item('rating_unitwidth'),
        );
        
        if($nojs) //javascript is disabled
        {
            //set $nojspage value in config
            redirect($this->config->item('nojspage'));
        }

        $this->load->view('newback_view', $data);
    }
}