Codeigniter routes are a way of remapping the URI pattern to a particular controller. By default, the index function of the default controller is invoked, but you can override this behavior by specifying a different controller and/or function:
http://example.com/index.php/blog/article/123In the example above, if the “blog” controller has an “article” function, it will be invoked for the URI pattern “blog/article/123”.
If you need to remap multiple URI patterns to different controllers/functions, you can do so by specifying an array of routes in the routes.php file. Each route can specify a controller/function, as well as a URI pattern to match:
$route['blog/article/123'] = 'blog/article';
$route['blog/article/124'] = 'blog/article';In the example above, the first route will match the URI pattern “blog/article/123” and route it to the “article” function of the “blog” controller. The second route will match the URI pattern “blog/article/124” and route it to the same “article” function.
You can also use regular expressions to match URI patterns. For example, the following route will match any URI that begins with “blog/article”:
$route['blog/article/(:num)'] = 'blog/article/$1';In the example above, the “(:num)” is a regular expression that will match any numeric value. The “$1” is a back-reference to the first matched group, which is the numeric value in this case.
If you need to match a URI pattern that is not already defined in the routes.php file, you can use the “*” wildcard character. The “*” character will match any character, including “/” (forward slash). For example, the following route will match any URI that begins with “blog/article”:
$route['blog/article/*'] = 'blog/article';In the example above, the “*” character will match any character, including “/” (forward slash).
You can also use the “*” wildcard character to specify a default controller. For example, the following route will match any URI that does not match a defined route:
$route['default_controller'] = 'blog';In the example above, the “default_controller” route will route any URI that does not match a defined route to the “blog” controller.
The routes.php file is located in the “config” folder.
How do Codeigniter routes work?
Codeigniter routes allow you to re-map the URI segments in your web application. By default, the first segment corresponds to the controller class and the second segment corresponds to the function name in that controller. However, you can remap the URI segments using the routes.php file in your application’s config directory.
For example, let’s say you have a URL like this:
http://example.com/index.php/blog/article/123By default, this URL would map to the following controller and function:
blog->article()However, let’s say you want to remap this URL so that it maps to the following controller and function:
articles->view()You can do this by adding the following route to your routes.php file:
$route['blog/article/(:num)'] = 'articles/view/$1';Now, when you visit the following URL:
http://example.com/index.php/blog/article/123It will map to the following controller and function:
articles->view()And the id parameter (123) will be passed to the view() function.
You can also use regular expressions in your routes.php file to make your routes more flexible. For more information on using regular expressions in routes, please see the Codeigniter documentation.
Why are they useful?
In fact, they’re so easy that many people don’t even realize that they’re using them. Let’s take a look at how routes work in CodeIgniter.
When you visit a website, your browser sends a request to the server that hosts the website. The server then looks at the request and decides what to do with it.
If the server is running CodeIgniter, it will use the CodeIgniter router to figure out what to do with the request. The router will take the URL that was requested and break it down into segments.
For example, let’s say that you visit the following URL:
http://example.com/news/article/123The router will break this down into the following segments:
news
article
123
The router will then look for a route that matches these segments. If it finds a match, it will use the controller and action that are associated with the route.
If it doesn’t find a match, it will use the default controller and action.
You can define your own routes in CodeIgniter. This is useful if you want to create friendly URLs or if you want to map a URL to a specific controller and action.
For example, you could define a route that maps the following URL:
http://example.com/news/article/123To the following controller and action:
NewsController::articleAction(123)You can also define routes that map to static pages. For example, you could define a route that maps the following URL:
http://example.com/aboutTo the following controller and action:
StaticController::aboutAction()CodeIgniter also provides a way to define routes that are only accessible via HTTPS. This is useful if you want to ensure that sensitive data is always transmitted securely.
To learn more about how to use routes in CodeIgniter, check out the documentation.
What are some tips for using routes effectively?
Because they are simple to understand and easy to use, they provide a great way to keep your application organized and to keep your code clean.
Routes in CodeIgniter are awesome because they are simple to understand and easy to use. They provide a great way to keep your application organized and keep your code clean.
Routes are essentially URLs that are mapped to specific controllers and/or methods. This means that you can easily access specific controllers and/or methods by simply visiting a URL.
For example, let’s say you have a controller named “Foo” with a method named “bar”. You can access this controller/method by visiting the following URL:
http://example.com/index.php/foo/barAs you can see, the URL is very simple and easy to remember. This makes it easy for you to keep your application organized and makes your code easier to read.
Overall, routes in CodeIgniter are extremely useful and can make your life much easier. If you are not using them, I highly recommend that you start!