Skip to main content

Data Load While Page Scrolling (infinite scroll) with jQuery PHP and MySQL

Infinity scroll is a way to load more data using Ajax request while page goes to scroll down. Now days this technique is mostly used by the most of the successful websites like Facebook, Google and Twitter. You will be see that on these web sites as long as you scrolling down the page loads more and more data or posts, that is called infinity scroll or endless scroll. Though it can be possible by using jQuery's jQuery.ajax or jQuery.load method but now days there are many jQuery plugins (like, Infinity Scroll, Infinite Ajax Scroll) are available to make it more easy. Today I am going to show you how we can turn a PHP and MySQL paginavigation based website into dynamic infinity scroll with jQuery Infinite Ajax Scroll plugin.


Live Demo Download

Database Structure

First we need to create a database table. Because, we need some large amount of data to make this demo up and run here I am using Sakila simple database's actor_info table. The structure of this table looks like....

CREATE TABLE `actor_info` (
  `id` int(5) NOT NULL AUTO_INCREMENT,
  `first_name` varchar(45) NOT NULL,
  `last_name` varchar(45) NOT NULL,
  `film_info` text NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

DB Configuration

The config.php file is responsible for database connect. I also include a variable named $limit with value of 10. It is the number of content you want to show on per page. You can increase or decrease this number as you want.

# db configuration 
define('DB_HOST', 'localhost');
define('DB_USER', 'root');
define('DB_PASS', 'root');
define('DB_NAME', 'dbname');

$limit = 10; #item per page
# db connect
$link = mysql_connect(DB_HOST, DB_USER, DB_PASS) or die('Could not connect to MySQL DB ') . mysql_error();
$db = mysql_select_db(DB_NAME, $link);

PHP and HTML

Take a look at the PHP and HTML code, this PHP code retrieves data from MySQL database with simple pagination.

<?php
include('config.php');
$page = (int) (!isset($_GET['p'])) ? 1 : $_GET['p'];
# sql query
$sql = "SELECT * FROM actor_info ORDER BY id DESC";
# find out query stat point
$start = ($page * $limit) - $limit;
# query for page navigation
if( mysql_num_rows(mysql_query($sql)) > ($page * $limit) ){
  $next = ++$page;
}
$query = mysql_query( $sql . " LIMIT {$start}, {$limit}");
if (mysql_num_rows($query) < 1) {
  header('HTTP/1.0 404 Not Found');
  echo 'Page not found!';
  exit();
}
?>
<!doctype html>
<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>jQuery Load While Scroll</title>
</head>
<body>
<div class="wrap">
  <h1><a href="#">Data load while scroll</a></h1>

  <!-- loop row data -->
  <?php while ($row = mysql_fetch_array($query)): ?>
  <div class="item" id="item-<?php echo $row['id']?>">
    <h2>
      <span class="num"><?php echo $row['id']?></span>
      <span class="name"><?php echo $row['first_name'].' '.$row['last_name']?></span>
    </h2>
    <p><?php echo $row['film_info']?></p>
  </div>
  <?php endwhile?>

  <!--page navigation-->
  <?php if (isset($next)): ?>
  <div class="nav">
    <a href='index.php?p=<?php echo $next?>'>Next</a>
  </div>
  <?php endif?>
</div><!--.wrap-->
</body>
</html>

JavaScript part

In the JavaScript section we need to first include jQuery and Infinity Ajax Scroll library. In the second pert we need to call jQuery.ias method and configure it. Take a look on the comments

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery-ias.min.js"></script>
<script type="text/javascript">
  $(document).ready(function() {
    // Infinite Ajax Scroll configuration
    jQuery.ias({
      container : '.wrap', // main container where data goes to append
      item: '.item', // single items
      pagination: '.nav', // page navigation
      next: '.nav a', // next page selector
      loader: '<img src="css/ajax-loader.gif"/>', // loading gif
      triggerPageThreshold: 3 // show load more if scroll more than this
    });
  });
</script>
Labels:

Popular posts from this blog

Multiple File Upload with Progress Bar using PHP & jQuery

Some days age I have created a post that deals with How we can upload file with progress bar using php and jQuery . Some of my readers asked me how we can upload multiple files with progress bar. In this post I am going to show you how we can upload multiple files with progress bar. We can upload multiple files with progress bar exactly same way as I shown previous. But we need to do some modification with our file upload form and our php script to handle multiple files.
Read more

File Upload with Progress Bar using jQuery and PHP

In this post you will learn how to create a AJAX file uploading system with progress bar using jQuery and PHP. For this purpose we will going to use jQuery Form Plugin . It is a easy to use and powerful jQuery AJAX form submitting plugin. It supports XMLHttpRequest Level 2 and iframe file transportation. That's why it will work for both old and new browsers.
Read more

Multiple File Upload with PHP

Sometimes we need to allow our users to upload multiple file upload. On my previous post I was shown the basic of simple file upload with PHP. Today I am going to show you how to allow users to upload multiple files. It is almost similar like simple file upload but we need to do some modification with html markup and php code . multiple attribute is needed to add on the html markup. Major web browsers like Firefox, Chrome, Safari and IE 9+ support this attribute. Now I am going to show you how to upload multiple file with PHP and basic HTML form.
Read more