URL Parameters in CodeIgniter Framework

In CodeIgniter Project, Open autoload.php file in config folder. Add url helper to helper config as below:

$autoload['helper'] = array('url');

In CodeIgniter Project, Open config.php file in config folder. Set value for base_url config as below:

$config['base_url'] = 'http://localhost:9092/LearnCodeIgniterWithRealApps/';

Create new PHP file named demo.php in controllers folder as below:

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

class Demo extends CI_Controller
{

    public function index()
    {
        $this->load->view('demo/index');
    }

    public function demo1($id)
    {
        $data['id'] = $id;
        $this->load->view('demo/demo1', $data);
    }

    public function demo2($id1, $id2)
    {
        $data['id1'] = $id1;
        $data['id2'] = $id2;
        $this->load->view('demo/demo2', $data);
    }

    public function demo3()
    {
        $data['id1'] = $_GET['id1'];
        $data['id2'] = $_GET['id2'];
        $this->load->view('demo/demo3', $data);
    }
}

In CodeIgniter Project, Open routes.php file in config folder. Set value for default_controller as below:

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

Create new folder named demo in views folder. In this folder, create new views as below:

Create new PHP file named index.php as below:

<?php defined('BASEPATH') or exit('No direct script access allowed'); ?>
<html>
	<head>
		<title>Demo Page</title>
	</head>
	<body>

		<a href="<?php echo site_url('demo/demo1/123'); ?>">Demo 1</a>
		<br>
		<a href="<?php echo site_url('demo/demo2/123/abc'); ?>">Demo 2</a>
		<br>
		<a href="<?php echo site_url('demo/demo3?id1=456&id2=def'); ?>">Demo 3</a>

	</body>
</html>

Create new PHP file named demo1.php as below:

<?php defined('BASEPATH') or exit('No direct script access allowed'); ?>
<html>
	<head>
		<title>Demo 1 Page</title>
	</head>
	<body>

		Id: <?php echo $id; ?>

	</body>
</html>

Create new PHP file named demo2.php as below:

<?php defined('BASEPATH') or exit('No direct script access allowed'); ?>
<html>
	<head>
		<title>Demo 2 Page</title>
	</head>
	<body>

		Id 1: <?php echo $id1; ?>
		<br>
		Id 2: <?php echo $id2; ?>

	</body>
</html>

Create new PHP file named demo3.php as below:

<?php defined('BASEPATH') or exit('No direct script access allowed'); ?>
<html>
	<head>
		<title>Demo 3 Page</title>
	</head>
	<body>

		Id 1: <?php echo $id1; ?>
		<br>
		Id 2: <?php echo $id2; ?>

	</body>
</html>

Access index action in Demo controller with following url: http://localhost:9092/LearnCodeIgniterWithRealApps/demo/index

Output

Click Demo 1 link will call to demo1 action in Demo controller with following url: http://localhost:9092/LearnCodeIgniterWithRealApps/index.php/demo/demo1/123

Output

Click Demo 2 link will call to demo2 action in Demo controller with following url: http://localhost:9092/LearnCodeIgniterWithRealApps/index.php/demo/demo2/123/abc

Output

Click Demo 3 link will call to demo3 action in Demo controller with following url: http://localhost:9092/LearnCodeIgniterWithRealApps/index.php/demo/demo3?id1=456&id2=def

Output

I recommend you refer to the books below to learn more about the knowledge in this article:

AutoLoad Helper

Set BASE URL

Create Controller

Set Default Controller

Create View

Index View

Demo1 View

Demo2 View

Demo3 View

Structure of CodeIgniter Project

Run Application

References

AutoLoad Helper

Set BASE URL

Create Controller

Set Default Controller

Create View

Index View

Demo1 View

Demo2 View

Demo3 View

Structure of CodeIgniter Project

Run Application

References

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