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Upgrade Routing

Documentation

What has been changed

  • In CI4 the Auto Routing is disabled by default.
  • In CI4 the new more secure Auto Routing (Improved) is introduced.
  • In CI4 the routing is no longer configured by setting the routes as an array.
  • The Wildcard (:any) in CI3 will be the Placeholder (:segment) in CI4. The (:any) in CI4 matches multiple segments. See URI Routing.

Upgrade Guide

  1. If you use the Auto Routing in the same way as CI3, you need to enable Auto Routing (Legacy).

  2. You have to change the syntax of each routing line and append it in app/Config/Routes.php. For example:

    • $route['journals'] = 'blogs'; to $routes->add('journals', 'Blogs::index');. This would map to the index() method in the Blogs controller.
    • $route['product/(:any)'] = 'catalog/product_lookup'; to $routes->add('product/(:segment)', 'Catalog::productLookup');. Don't forget to replace (:any) with (:segment).
    • $route['login/(.+)'] = 'auth/login/$1'; to $routes->add('login/(.+)', 'Auth::login/$1');

    Note

    For backward compatibility, $routes->add() is used here. But we strongly recommend using HTTP verb Routes like $routes->get() instead of $routes->add() for security.

Code Example

CodeIgniter Version 3.x

Path: application/config/routes.php:

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

// ...

$route['posts/index']  = 'posts/index';
$route['teams/create'] = 'teams/create';
$route['teams/update'] = 'teams/update';

$route['posts/create']   = 'posts/create';
$route['posts/update']   = 'posts/update';
$route['drivers/create'] = 'drivers/create';
$route['drivers/update'] = 'drivers/update';
$route['posts/(:any)']   = 'posts/view/$1';

CodeIgniter Version 4.x

Path: app/Config/Routes.php:

<?php

use CodeIgniter\Router\RouteCollection;

/** @var RouteCollection $routes */
$routes->get('/', 'Home::index');

$routes->add('posts/index', 'Posts::index');
$routes->add('teams/create', 'Teams::create');
$routes->add('teams/update', 'Teams::update');

$routes->add('posts/create', 'Posts::create');
$routes->add('posts/update', 'Posts::update');
$routes->add('drivers/create', 'Drivers::create');
$routes->add('drivers/update', 'Drivers::update');
$routes->add('posts/(:segment)', 'Posts::view/$1');

Note

For backward compatibility, $routes->add() is used here. But we strongly recommend using HTTP verb Routes like $routes->get() instead of $routes->add() for security.