1. Nitin Reddy Katkam

2. Introduction
CodeIgniter:
 Helps builds PHP applications based on
the MVC structure
 Contains system and application folders;
application folder contains
models, views, and controllers folders

3. Configuration
“application/config/database.php”
“application/config/autoload.php”
Set:
 $db['default']['hostname'] = 'localhost';
 $db['default']['username'] = 'username';
 $db['default']['password'] = 'password';
 $db['default']['database'] = 'dbname';

4. Controllers
“application/controllers”
Controllers:
 The default controller is welcome
(defined in routes)
 The default action is index()
 Extend CI_Controller

5. Controllers (Contd)
http://localhost/ci/index.php/product
<?php
class Product extends CI_Controller {
public function index() {
echo 'Product index';
}
}

6. Controllers (Contd)
 Call echo() to display data
 Put your data into an array
 Call $this->load->view() to display a
view
 Load C.I. functions:
 Alternative to autoload
 $this->load->helper()
 $this->load->library()

7. Views
“application/views”
Views:
 Data from the array sent from the
controller is extracted

8. URL Helper
 anchor(„controller/action‟, „text‟, array(„att
ribute‟=>‟value‟))
 redirect(„controller/action‟)

9. Form Helper
 form_open(„controller/action‟)
 form_label(„text‟, „for attrib value‟)
 form_input(„name‟)
 form_password(„name‟)
 form_textarea(„name‟)
 form_submit(„name‟, „text‟)
 form_dropdown(„name‟, name-
value_pair_array, „selected‟)
 form_close()

10. Models
“application/models”
Models:
 Extend CI_Model
 Generally uses the database library
extensively

11. Database Library
 Generally called from a model class as
$this->db->function_name
 Functions:
 get(table_name, limit, offset)
 insert(table_name, model)
 insert_id()
 where(column_name, value)
 update(table_name, model)
 delete(table_name)
 count_all(table_name)

12. For more, reach me at...
 WWW: nitinkatkam.com
 Blog: n4express.com
 Email: k_nitin_r [at] yahoo.co.in