Star Rating System With JQuery, Ajax, PHP And MySQL


Star rating system with PHP MySQL, jquery, and ajax on products, etc posts. In this tutorial, we will learn how to create a simple star rating script with PHP MySQL using jQuery and ajax. Then display the star ratings on the web (HTML) page from the database.

If the user changes the start rating then send an AJAX request to save the database table with PHP.

Sometimes, you have products/posts on your website or blog. And may want to get a star rating from the user. So this tutorial will help you display star rating in PHP.

★★★★★ Star Rating System With JQuery, Ajax, PHP And MySQL

Just follow the below given simple steps to create a customer/user star rating system in PHP MySQL using jQuery and ajax. And store star rating into the database:

Step 1: Create Star Rating Table Into Database

Open your database and run the following SQL queries to create a country, state, and city table into the database:

Run this following SQL query to create posts and post_rating table into your database:

CREATE TABLE `posts` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` varchar(100) NOT NULL,
  `content` text NOT NULL,
  `link` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;
 
CREATE TABLE IF NOT EXISTS `post_rating` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `post_id` int(11) NOT NULL,
  `rating` int(2) NOT NULL,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;
Step 2: Create DB Connection PHP File

Create a file name db.php and update the following code into db.php file:

<?php
    $servername='localhost';
    $username='root';
    $password='';
    $dbname = "my_db";
    $conn=mysqli_connect($servername,$username,$password,"$dbname");
      if(!$conn){
          die('Could not Connect MySql Server:' .mysql_error());
        }
?>
Step 3: Create Html To Get And Display Star Rating From Database

In this step, create a display-star-rating.php file and update the below PHP and HTML code into display-star-rating.php file.

Note that, This HTML code shows the star rating on posts. And also users give ratings by clicking on stars.

Now, update the following HTML form into display-star-rating.php file:

<!doctype html>
<html lang="en">
   <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
      <title>Get And Display Star Rating In PHP with jQuery Ajax - phpcodingstuff.com</title>
      <!-- CSS -->
      <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/latest/css/font-awesome.min.css">
      <link href='https://cdnjs.cloudflare.com/ajax/libs/jquery-bar-rating/1.2.2/themes/fontawesome-stars.min.css' rel='stylesheet' type='text/css'>
      <!-- Script -->
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js" type="text/javascript"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-bar-rating/1.2.2/jquery.barrating.min.js" integrity="sha512-nUuQ/Dau+I/iyRH0p9sp2CpKY9zrtMQvDUG7iiVY8IBMj8ZL45MnONMbgfpFAdIDb7zS5qEJ7S056oE7f+mCXw==" crossorigin="anonymous"></script>
      <style>
         .content {
	border: 0px solid black;
	border-radius: 3px;
	padding: 5px;
	margin: 0 auto;
	width: 50%;
}

.post {
	border-bottom: 1px solid black;
	padding: 10px;
	margin-top: 10px;
	margin-bottom: 10px;
}

.post:last-child {
	border: 0;
}

.post h1 {
	font-weight: normal;
	font-size: 30px;
}

.post a.link {
	text-decoration: none;
	color: black;
}

.post-text {
	letter-spacing: 1px;
	font-size: 15px;
	font-family: serif;
	color: gray;
	text-align: justify;
}

.post-action {
	margin-top: 15px;
	margin-bottom: 15px;
}

.like,
.unlike {
	border: 0;
	background: none;
	letter-spacing: 1px;
	color: lightseagreen;
}

.like,
.unlike:hover {
	cursor: pointer;
}
      </style>
   </head>
   <body>
      <div class="container">
         <div class="content">
            <?php
               include "db.php";
               $user_id = 10;
               $query = "SELECT * FROM posts";
               $result = mysqli_query($con,$query);
               while($row = mysqli_fetch_array($result)){
               $post_id = $row['id'];
               $title = $row['title'];
               $content = $row['content'];
               $link = $row['link'];
               // User rating
               $query = "SELECT * FROM post_rating WHERE post_id=".$post_id." and user_id=".$user_id;
               $userresult = mysqli_query($con,$query) or die(mysqli_error());
               $fetchRating = mysqli_fetch_array($userresult);
               $rating = $fetchRating['rating'];
               // get average
               $query = "SELECT ROUND(AVG(rating),1) as averageRating FROM post_rating WHERE post_id=".$post_id;
               $avgresult = mysqli_query($con,$query) or die(mysqli_error());
               $fetchAverage = mysqli_fetch_array($avgresult);
               $averageRating = $fetchAverage['averageRating'];
               if($averageRating <= 0){
               $averageRating = "No rating yet.";
               }
               ?>
            <div class="post">
               <h1><a href='<?php echo $link; ?>' class='link' target='_blank'><?php echo $title; ?></a></h1>
               <div class="post-text">
                  <?php echo $content; ?>
               </div>
               <div class="post-action">
                  <!-- Rating -->
                  <select class='rating' id='rating_<?php echo $post_id; ?>' data-id='rating_<?php echo $post_id; ?>'>
                     <option value="1" >1</option>
                     <option value="2" >2</option>
                     <option value="3" >3</option>
                     <option value="4" >4</option>
                     <option value="5" >5</option>
                  </select>
                  <div style='clear: both;'></div>
                  Average Rating : <span id='avgrating_<?php echo $post_id; ?>'><?php echo $averageRating; ?></span>
                  <!-- Set rating -->
                  <script type='text/javascript'>
                     $(document).ready(function(){
                     $('#rating_<?php echo $post_id; ?>').barrating('set',<?php echo $rating; ?>);
                     });
                  </script>
               </div>
            </div>
            <?php
               }
               ?>
         </div>
      </div>
      <script type="text/javascript">
        $(function() {
    $('.rating').barrating({
        theme: 'fontawesome-stars',
        onSelect: function(value, text, event) {
            // Get element id by data-id attribute
            var el = this;
            var el_id = el.$elem.data('id');
            // rating was selected by a user
            if (typeof(event) !== 'undefined') {
                var split_id = el_id.split("_");
                var post_id = split_id[1]; // post_id
                // AJAX Request
                $.ajax({
                    url: 'store-star-rating-db.php',
                    type: 'post',
                    data: {
                        post_id: post_id,
                        rating: value
                    },
                    dataType: 'json',
                    success: function(data) {
                        // Update average
                        var average = data['averageRating'];
                        $('#avgrating_' + post_id).text(average);
                    }
                });
            }
        }
    });
});
      </script>
   </body>
</html>
Step 4: Store Star Rating Into Database Using JQuery Ajax

Create an again new PHP file named store-star-rating-db.php. This PHP code is a simple star rating script PHP.

To update the following PHP and HTML code into store-star-rating-db.php file:

<?php
include "db.php";
$user_id = 10; // User id
$post_id = $_POST['post_id'];
$rating = $_POST['rating'];
// Check entry within table
$query = "SELECT COUNT(*) AS postCount FROM post_rating WHERE post_id=".$post_id." and user_id=".$user_id;
$result = mysqli_query($con,$query);
$fetchdata = mysqli_fetch_array($result);
$count = $fetchdata['postCount'];
if($count == 0){
$insertquery = "INSERT INTO post_rating(user_id,post_id,rating) values(".$user_id.",".$post_id.",".$rating.")";
mysqli_query($con,$insertquery);
}else {
$updatequery = "UPDATE post_rating SET rating=" . $rating . " where user_id=" . $user_id . " and post_id=" . $post_id;
mysqli_query($con,$updatequery);
}
// get average
$query = "SELECT ROUND(AVG(rating),1) as averageRating FROM post_rating WHERE post_id=".$post_id;
$result = mysqli_query($con,$query) or die(mysqli_error());
$fetchAverage = mysqli_fetch_array($result);
$averageRating = $fetchAverage['averageRating'];
$return_arr = array("averageRating"=>$averageRating);
echo json_encode($return_arr);

Documentation and examples of use can be found here.


I hope it can help you...

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