Infinite Scroll Pagination In Codeigniter Using Jquery And Ajax


Today we are learning how to create infinite scroll pagination in Codeigniter using jquery and ajax with example. we have seen like Facebook, Twitter, or other websites to use an infinite scroll that automatically loaded content when scrolling down to the web page.

So you can follow the below steps and see our example for using ajax pagination in Codeigniter.

Overview

1. Create a Database and Table

2. Connect to Database

3. Get the limit data

4. Get the infinite data

[ Infinite Scroll ] Pagination In Codeigniter Using Jquery And Ajax
Step 1: Create A Database And Table

First of all, we will create a database and table. after then we will insert many dummy data in the table. here we take the products table and also added products related data into the product table. so you can see the below code.

$db['default'] = array(
	'dsn'	=> '',
	'hostname' => 'localhost',
	'username' => 'root',
	'password' => '',
	'database' => 'codeigniter_pagination',
	'dbdriver' => 'mysqli',
	'dbprefix' => '',
	'pconnect' => FALSE,
	'db_debug' => (ENVIRONMENT !== 'production'),
	'cache_on' => FALSE,
	'cachedir' => '',
	'char_set' => 'utf8',
	'dbcollat' => 'utf8_general_ci',
	'swap_pre' => '',
	'encrypt' => FALSE,
	'compress' => FALSE,
	'stricton' => FALSE,
	'failover' => array(),
	'save_queries' => TRUE
);
Step 2: Connect To Database

Here in this step, we will open the database.php file in the config directory and some changes in this file like hostname, database username, database password, and database name.

Step 3: Get The Limit Data

We have to need limited data for display in the project. so we are displaying 10 data per rows. this time infinite scroll jquery example, we will take a constant variable so we can display 10 data per rows. now here we will take two hidden inputs fields for the current row position and the total number of rows.

So you can see our index method code for the first time get rows records in your controller.

public function index() {
        $row= 0;
        $row_per_page = 10;
        $all_product_count = $this->Product_model->all_product_count();
        //echo $all_product_count; die;
        $data_proudct = $this->Product_model->get_product($row,$row_per_page);
        $data['products'] =$data_proudct;
        $data['all_product_count'] =$all_product_count;
        $this->load->view('product', $data);
    }
Step 4: Get The Infinite Data

This step we have used some functions. you can see it.

$(window).scrollTop() function when scroll then it will return current vertical position.

$(document).height() function return height of the document.

$(window).height() function return pixel value of the height of the (browser) window.

Then we scroll down if the current position and bottom position are the same then it will be passed next current row data using ajax and call into the pagination method. after it will be helpful for getting limited data into the query. copy the below code and past controller and ajax pagination in PHP.

public function pagination(){
        $row = $_POST['row'];
        $row_per_page = 10;
        $data_proudct = $this->Product_model->get_product($row,$row_per_page);

        $html ='';
        foreach ($data_proudct as $product){

                $html .= '<tr class="product" id="product_'.$product->id.'">';
                $html .= '<td>'.$product->title.'</td>';
                $html .= '<td>'.$product->description.'</td>';
                $html .= '<td>'.$product->price.'</td>';
                $html .= '<td>'.$product->created_at.'</td>';
                $html .= '</tr>';
        }
        echo $html;
    }

so you can see our full code.

views/product.php

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Infinite scroll pagination in codeigniter using  jquery and ajax - phpcodingstuff.com</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
    <script type="text/javascript">
         $(document).ready(function(){

            $(window).scroll(function(){

                var position = $(window).scrollTop();
                var bottom = $(document).height() - $(window).height();

                if( position == bottom ){
                    var row = Number($('#row').val());
                    var allcount = Number($('#all_product_count').val());
                    var rowperpage = 10;
                    row = row + rowperpage;

                    if(row <= allcount){
                        $('.ajax-load').show();
                        var url = "<?php echo base_url(); ?>index.php/welcome/pagination";
                        $('#row').val(row);
                        $.ajax({
                            url: url,
                            type: 'post',
                            data: {row:row},
                            success: function(response){
                                $('.ajax-load').hide();
                                $(".product:last").after(response).show().fadeIn("slow");
                            }
                        });
                    }
                    else
                    {
                        $('#remove').remove();
                        $(".product:last").after('<tr id="remove"><td colspan="4" style="text-align: center;"><b>No Data Available</b></td></tr>');

                    }
                }
            });
        });
    </script>
    <style>
        table {
            border-collapse: collapse;
            border-spacing: 0;
            width: 100%;
            border: 1px solid #ddd;
        }

        th,td {
            text-align: left;
            padding: 8px;
        }

        tr:nth-child(even){background-color: #f2f2f2}
    </style>
</head>
<body>

<div class="container">
    <h2>Product Table</h2>
    <div style="overflow-x:auto;">
        <table class="table table-bordered">
            <thead>
            <tr>
                <th>Product Name</th>
                <th>Description</th>
                <th>Price</th>
                <th>Create</th>
            </tr>
            </thead>
            <tbody>
            <?php
            foreach ($products as $product){
            ?>
            <tr class="product" id="product_<?php echo $product->id; ?>">
                <td><?php echo $product->title; ?></td>
                <td><?php echo $product->description; ?></td>
                <td><?php echo $product->price; ?></td>
                <td><?php echo $product->created_at; ?></td>
            </tr>
            <?php } ?>
            </tbody>
        </table>
        <input type="hidden" id="row" value="0">
        <input type="hidden" id="all_product_count" value="<?php echo $all_product_count; ?>">
    </div>
    <div class="row ajax-load" style="display: none;">
        <div class="col-lg-12" style="text-align: center;"><img width="100" height="100" src="https://www.primebldg.com/wp-content/uploads/2017/09/ajax-loader.gif"></div>
    </div>
</div>
</body>
</html>

controllers/Welcome.php

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

class Welcome extends CI_Controller {

	/**
	 * Index Page for this controller.
	 *
	 * Maps to the following URL
	 * 		http://example.com/index.php/welcome
	 *	- or -
	 * 		http://example.com/index.php/welcome/index
	 *	- or -
	 * Since this controller is set as the default controller in
	 * config/routes.php, it's displayed at http://example.com/
	 *
	 * So any other public methods not prefixed with an underscore will
	 * map to /index.php/welcome/<method_name>
	 * @see https://codeigniter.com/user_guide/general/urls.html
	 */
	
	
	function __construct() {
        parent::__construct();
        $this->load->model("Product_model");
    }

    public function index() {
        $row= 0;
        $row_per_page = 10;
        $all_product_count = $this->Product_model->all_product_count();
        //echo $all_product_count; die;
        $data_proudct = $this->Product_model->get_product($row,$row_per_page);
        $data['products'] =$data_proudct;
        $data['all_product_count'] =$all_product_count;
        $this->load->view('product', $data);
    }

    public function pagination(){
        $row = $_POST['row'];
        $row_per_page = 10;
        $data_proudct = $this->Product_model->get_product($row,$row_per_page);

        $html ='';
        foreach ($data_proudct as $product){

                $html .= '<tr class="product" id="product_'.$product->id.'">';
                $html .= '<td>'.$product->title.'</td>';
                $html .= '<td>'.$product->description.'</td>';
                $html .= '<td>'.$product->price.'</td>';
                $html .= '<td>'.$product->created_at.'</td>';
                $html .= '</tr>';
        }
        echo $html;

    }
}
?>

models/Product_model.php

<?php

class Product_model extends CI_Model {

    public function all_product_count(){
		
		$query = $this->db->query("SELECT * FROM products")->result();
        return count($query);
    }

    public function get_product($page,$row_per_page)
    {
        $query = $this->db->query("SELECT * FROM products ORDER BY id desc limit ".$page.",".$row_per_page);
        return $query->result();
    }

}
?>

I hope it can help you...

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