Page Contents:

1. What is a codigniter?
2. Let’s try it: Welcome to Texinterest
3. Methods in codigniter
4. Defining a Default Controller

• Controller files are located in the application/controllers/ directory.
• A controller is a class file name that is associated with a URI.

Consider the below URI:

• url_name.com/index.php/Test/
• Codigniter would make an attempt to find the controller Test.php in the application/controllers/ directory.

Let’s try it: Welcome to Texinterest

• Create a file Test.php in the application/controllers/ directory.

      <?php
      class Test extends CI_Controller {
  
              public function index()
              {
                      echo 'Welcome to texinterest';
              }
      }    

• The first letter of Controller name and class name should be capitalized.
• Next visit the URL   url_name.com/index.php/Test/
• You will get the response.

      Welcome to texinterest

Methods in codigniter

• The index method will always loaded by default.    
• The another way to show the message "Welcome to texinterest" is

     url_name.com/index.php/Test/index

• The second method determines which method in the controller get's called

      <?php
      class Test extends CI_Controller {
  
              public function index()
              {
                      echo 'Now you are in index function';
              }
  
              public function one()
              {
                      echo 'Now you are in function 1';
              }
  
              public function two()
              {
                      echo 'Now you are in function 2';
              }
      }
    
   

• when you call the function url_name.com/index.php/Test/index, You will get the response 

       Now you are in index function

• when you call the function url_name.com/index.php/Test/one, You will get the response

       Now you are in function 1

• when you call the function url_name.com/index.php/Test/two, You will get the response

       Now you are in function 2

Defining a Default Controller

• To specify a default controller, open your application/config/routes.php and set in this your variable.

       $route['default_controller'] = 'Test';