- CodeIgnitor (CI) uses the MVC framework with models for database relations, controllers for CI functions, and views for HTML/CSS layout files. - To download CI, visit the website and extract the ZIP file into a web host directory. - The first controller can be created by making a new PHP file in the controllers folder that extends the CI_Controller class and contains an index() function to print output.

1. CodeIgnator
Day 1

2. MCV
• M{odel} : consist of methods dat relating with
database
• C{ontroller} : CI functions
• V{iew} : Layout files ‘HTML and CSS’

3. Download CI
• Go to CI website
https://www.codeigniter.com/download
• Then download
• Move CI ZIP file into your Host e.g:”localhost”
inside CI directory .
• Un-zip your CI file.

4. How to create your 1st
Controller

5. Create control and print ‘whatever!’
• Go to controllers folder and create new file
assume site.php
• Make new class as name as your file name
extends from CI_Controller’class’
• Inside da class create new FN call it as you like
eg: index()
• Inside the function print anything

6. Example

7. How to call class
• http://localhost/ci/index.php/site
• http://localhost/ci “main page”
• Site ‘class name’

8. Example

9. How make method and call it

10. Create another method

11. Call method in URL
• It as class calling following with method name
• Example

12. note
• don’t use the controller to echo ‘print’
something , it just example
• Controller using to accessing models for
database and views
• What about if you wann to make your method
un-accessable ? ‘make a private’
• Just put _ before your method name .

13. Create a view

14. • Create a new home.php inside views folder
‘ci/views’
• Example

15. How to load views by controller
• Inside the function just type
“$this->load->view(‘view_name’);”
• Example

16. Lets Call the controller that handled to
load a view

17. Good ! lets retrieve some thing into
aview ‘make it dynamic’ from
controller
• 1st create variables and pass its with the view
inside the controller
• Example

18. Retrieve variable in aview
• Call variable be like
‘<?php echo $variable_name; ?>’

20. Models
How DB accessing

21. Steps
• Create site_model.php inside models folder.
• Create site_model class extends from Model
• Make function getAll()
• Make aquary be like this
• $q=$this->db(‘table_name’);
• Make foreach loop to get da results

22. Example

23. Lets call the model inside the
controller and retrieve the variable
results
• Load model be like
‘$this->load->model(‘model_name’);’

24. Example

25. Retrieve results inside view

26. Done ‘1st day’