CodeIgniter Tutorial – Register and Login with Ajax

Codeigniter is a PHP framework which contains libraries, helpers, plugin-in and other resources. It will make the PHP codes in simple, quick and user-friendly. It is a lightweight and MVC programming technique to keep the business logic separate from the layout of the application. MVC stands for Model View Controller which is a software development method splitting the data layer (Model), the business logic (Controller) and the layout of the application (View). With the help of this framework, we will be building the simple Register and Login application with Ajax.

Table of Content

  1. Introduction
  2. Configure Config File
  3. Configure Database
  4. Database Connection
  5. Register and Login Demonstration
  6. Source Code


This tutorial will teach you to create register and login system with ajax. The registration and login system is the most important role in the web application. The user’s login status will be checked by the session.

The source code of this application is provided at the end of this tutorial, you can easily download them by clicking on the download button. As well as, the database is also required to run the application correctly. So please do not forget to download the database and run them into the phpMyAdmin.

Configure Config File

In this part, Go to config.php file i.e. application/config/config.php and you must change base URL root to work the code properly without any errors. You will have to modify the base URL value in the config file to help the CodeIgniter to guess the protocol and path of your installation.

| Base Site URL
| URL to your CodeIgniter root. Typically this will be your base URL,
| WITH a trailing slash:
| http://localhost/codeigniter_register_login/
$config['base_url'] = 'http://localhost:9080/codeigniter_register_login/';


Configure Database

Database Name: codeigniter_register_login
Table Name: users
Table Column: id, username, password, salt, name, contact

To create the database for this tutorial, either you can download the SQL file which is provided at the end of this tutorial or copy and paste this following SQL command into you MYSQL Database.

CREATE DATABASE `crud_datatables_codeigniter`;

CREATE TABLE `codeigniter_register_login`.`users` (
  `username` varchar(255) NOT NULL,
  `password` varchar(255) NOT NULL,
  `salt` text NOT NULL,
  `name` varchar(255) NOT NULL,
  `contact` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)

Database Connection

In database.php file i.e. [application/config/database.php], contains a database connection. If you have different database name then change the database name in database.php file highlighted at below.

$db['default'] = array(
	'dsn'	=> '',
	'hostname' => 'localhost',
	'username' => 'root',
	'password' => '',
	'database' => 'codeigniter_register_login',
	'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

Register and Login Demonstration

Source Code !!


Database !!

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