Routing rules are defined in your /app/Config/Routes.php file.

There is a one-to-one relationship between a URL string and its corresponding controller class/method. The segments in a URI normally follow this pattern:

example.com/class/function/id/

Syntax:

$routes->add('from', 'to', $options);

In some cases, you may want to remap this relationship so that a different class/method can be called instead of the one corresponding to the URL.

To learn how to implement routers on a real-world project, we will assume that we are creating an application for managing contact details. The following table shows the URLs that will be working with.

Create URLs for Applications

create routes for our project. Open /app/Config/Routes.php

$routes->setDefaultController('Home');
$routes->setDefaultMethod('index');
$routes->add('/', 'Contacts::index');
$routes->add('contacts/list', 'Contacts::list');
$routes->add('contacts/add', 'Contacts::add');
$routes->post('contacts/create', 'Contacts::create');
$routes->get('contacts/edit/(:any)', 'Contacts::edit/$1');
$routes->post('contacts/update', 'Contacts::update');
$routes->get('contacts/delete/(:any)', 'Contacts::delete/$1');

The following table shows the respective URLs obtained from the above-defined routes

Directory structure

/app
Views
	+ contacts
		- add.php
		- list.php
		- edit.php

	+ innerpages
		- header.php
		- footer.php
		- template.php
	- home.php

Global Options

The methods for creating a route (add, get, post, resource, etc.) can take an array of options that can modify the generated routes or further restrict them. The $options an array is always the last parameter:

$routes->get('from', 'to', $options);
$routes->post('from', 'to', $options);
$routes->put('from', 'to', $options);
$routes->head('from', 'to', $options);
$routes->options('from', 'to', $options);
$routes->delete('from', 'to', $options);
$routes->patch('from', 'to', $options);
$routes->match(['get', 'put'], 'from', 'to', $options);
$routes->resource('photos', $options);
$routes->map($array, $options);
$routes->group('name', $options, function());