How to Create Star Rating using CodeIgniter and jQuery Star Rating Plugin

$(function() {

       $('.star-radio').rating({

            required: true,

            callback: function(value, link) {

            $.ajax({

                type: "post",

                url: site_url + "user/rate",

                dataType: "json",

                data: "&post_url=" + $('#post_url').val() + "&rate_val=" + value,

                success: function(e) {

                    $.jGrowl(e.code + "<br>" + e.msg);

                }

         });

     }

});

On the code snippet above, we implement the rating plugin on the HTML element which has "star-radio" class attribute, which is your radio button as rating control. Every time user rate to a post, the script will send an Ajax request to User controller and send the rate data to the "rate" function.

<?php

    // .. some User controller code up here

    // Rate function on User Controller

    public function rate()

    {

        // Turn of layout for Ajax request

        unset($this->layout);

        // Gather ajax post data

        $rate = $this->input->post("rate_val", true);

        $post_url = $this->input->post("post_url", true);

        // Load model data

        $this->load->model('Post');

        $post_id = $this->Post->get_post_id($post_url);

        // Call function to check if user is login

        // return current login user id, null if not login yet

        // You need to define this helper function your self

        if (get_user_id()) {

            // Call the Post Model is_rated method to check whether the current login user has submit a rate to related post

            if (!$this->Post->is_rated(get_user_id(), $post_id))

            {

                $data = array("post_id" => $post_id,

                    "user_id" => get_user_id(),

                    "posts_rating_value" => $rate,

                    "posts_rating_date" => date("Y-m-d H:i:s")

                );

                // Call Post model method to insert rating data

                if ($this->Post->insert_rating($data, $post_id, $rate)) {

                    echo json_encode(array("code" => "Success", "msg" => "Thank you, rate has been submitted"));

                }

                else {

                    echo json_encode(array("code" => "Error", "msg" => "Sorry, something wrong. Please try again."));

                }

            }

            // If post has been rated by the current login user

            else {

                echo json_encode(array("code" => "Error", "msg" => "You have already rated this post"));

            }

        }

        // User is not login yet, ask them to login first

        else {

            echo json_encode(array("code" => "Error", "msg" => "Please login to submit this rate"));

        }

        // Do not proceed to view, just terminate to send Json response

        exit;

    }

    // .. any other User controller code goes here

?>

Following is the CodeIgniter View sample code for the rating control on your post view:

<?php

//Check if user logged in

if (!get_user_id()) {

    $radioIsActive = "disabled=disabled ";

}

else {

    $radioIsActive = " ";

}

?>

<?php

for ($i = 1; $i <= 5; $i++) :

    if ($i == round($row["average"])) :

?>

    <input class="star-radio" type="radio" name="rating" value="<?php echo $i; ?>" checked="checked" <?php echo "$radioIsActive"; ?>/>

    <?php else: ?>

    <input class="star-radio" type="radio" name="rating" value="<?php echo $i; ?>" <?php echo "$radioIsActive"; ?>/>

<?php

    endif;

endfor;

?>