Star rating system/code with PHP MySQL & jquery and Ajax on products, and posts. In this tutorial, we will show you how to build 5 star rating system with PHP MySQL using jQuery and Ajax. As well as, To display the 5 star ratings on the web (HTML) page from the database.
If the user/customer changes the start rating then send an AJAX request to save the user’s current rating status on the MySQL database table with PHP.
Sometimes, you have products/posts on your website or blog. And may want to get a start rating from the user 👤 or customer. So this tutorial will help you to get a review of start rating into your website or blog using jQuery ajax in php mysql by users 👥 or customers.
5 Star Rating System using jQuery Ajax in PHP and MySQL
Steps to create a 5-star rating system/code in PHP MySQL using jQuery and ajax. And store star ratings in database:
- Step 1: Create Star Rating Table into Database
- Step 2: Create DB Connection PHP File
- Step 3: Create Html to Get and Display Star Rating From Database
- Step 4: Store Star Rating Into Database using jQuery Ajax
Step 1: Create Star Rating Table into Database
First of all, open your database and run the following sql queries to create 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
In this step, 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());
}
?>
Note that, This code is used to create a MySQL database connection in PHP project.
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 user give rating 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</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
In this step, create an again new PHP file named store-star-rating-db.php. This PHP code will store star rationg on post by user into database table.
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);
Note that, if you found any error ralated to jQuery star rating library. So, You can download the plugin from here. And then include in your display-star-rating.php file.
Conclusion
Get star rating and display star rating from database in PHP with jQuery and ajax tutorial, you have learned how to get start rating on posts/products by user/customer using jQuery ajax in php.
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