How to install and setup codeigniter framework
CodeIgniter is a powerful open-source PHP framework with a very small footprint, created by Rick Ellis in 2006.
I will present you a step-by-step instruction how to set up development environment from a codeigniter framework.In this tutorial I am using CodeIgniter 3.1.9.
1.) Download Codeigniter:
Download Codeigniter framework.

2.) Unzip the File:
Now Unzip the folder inside C:\xampp\htdocs. You can rename folder name like myapp .

3.) Initial testing:
Everything is ready so finally let’s launch the Codeigniter app.Now let’s move on to browser and type in URL http:\\localhost\myapp.You will get interface as showing in below.

4.) Database Configuration:
Let’s now setup the database located in myapp/application/config/database.php. Change the username,password and database name.

5.) Mysql database table:
Next,Create database table.In my case database name is myapp and the table name is tbl_user. You can create table by running below script.
[php] CREATE TABLE `tbl_user` ( `id` int(11) NOT NULL, `name` varchar(255) NOT NULL, `mobile` varchar(255) NOT NULL, `address` varchar(255) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1; ALTER TABLE `tbl_user` ADD PRIMARY KEY (`id`); ALTER TABLE `tbl_user` MODIFY `id` int(11) NOT NULL AUTO_INCREMENT; [/php]
6.) Creating View:
Next, create a view file in your myapp/application/views directory called registerview.php with this code.
registerview.php
[html] <html> <head> <title>Register</title> </head> <body> <style> h3 { font-family: Verdana; font-size: 18pt; font-style: normal; font-weight: bold; color:red; text-align: center; } table{ font-family: Verdana; color:black; font-size: 12pt; font-style: normal; font-weight: bold; text-align:left; border-collapse: collapse; } </style> <h3>Registration</h3> <form name=”registerview” action=”<?php echo base_url(); ?>register” method=”post”> <table align=”center” cellpadding = “5”> <tr> <td>Name</td> <td><input type=”text” name=”name” maxlength=”50″/></td> </tr> <tr> <td>Mobile</td> <td><input type=”text” name=”mobile” maxlength=”10″/></td> </tr> <tr> <td>Adress</td> <td><input type=”text” name=”address” maxlength=”100″/></td> </tr> <tr> <td colspan=”5″ align=”center”> <input type=”submit” value=”Register”/></td> </tr> </table> </form> </body> </html> [/html]
7.) Creating Controller:
Next, create a controller in your myapp/application/controller directory called RegisterController.php with this code.Make sure first letter of controller’s name in Uppercase as like i mention below.
RegisterController.php
[php] <?php defined(‘BASEPATH’) OR exit(‘No direct script access allowed’); class RegisterController extends CI_Controller { public function index(){ $this->load->view(‘registerview’); } public function register(){ $this->load->model(‘registermodel’); $data = array( ‘name’=>$this->input->post(‘name’), ‘mobile’=>$this->input->post(‘mobile’), ‘address’=>$this->input->post(‘address’) ); $this->registermodel->save($data); redirect(‘registercontroller’); } } [/php]
8.) Creating Model:
Next, create a model in your myapp/application/model directory called RegisterModel.php with this code. Make sure first letter of model’s name in Uppercase as like i mention below.
RegisterModel.php
[php] <?php class RegisterModel extends CI_Model { private $table_name = ‘tbl_user’; public function __construct() { $this->load->database(); } public function save($data){ $return = $this->db->insert($this->table_name, $data); return $this->db->insert_id(); } } ?> [/php]
9.) Next, load the library and helper in autoload.php file located in myapp/application/config/autoload.php.
[php] $autoload[‘libraries’] = array(‘database’); $autoload[‘helper’] = array(‘url’,’html’,’file’); [/php]
10.) Route Configuration:
Change the default controller in routes.php file located in myapp/application/config/routes.php.
[php] $route[‘default_controller’] = ‘registercontroller’; $route[‘register’] = ‘registercontroller/register’; $route[‘404_override’] = ”; $route[‘translate_uri_dashes’] = FALSE; [/php]
Now,move on to browser and type in URL http:\\localhost\myapp.You will get interface as showing in below.

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