Codeigniter Controller


Codeigniter Controller is simply class name which contains methods inside it.


All the controllers are kept inside the application/controllers folder.

Codeigniter Controller Syntax

Lets start with a simple controller named as “Helloworld”.

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Helloworld extends CI_Controller {
function index(){

echo "Hello world."; 

}

}   
?>                         

Try it »

Note Class name must start with uppercase
example:

class Helloworld extends CI_Controller {

}

Not Like This :

class helloworld extends CI_Controller {
// this invalid class name.

}

Now visit your site as :

http://localhost/Helloworld

Or

If you have not removed the index.php from url

http://localhost/index.php/Helloworld

Note : Default function index() will be called

Which is :

http://localhost/Helloworld/index

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