code igniter dynamic routing

问题:

I am using code igniter.

What I want to do is,

if a page is visited that does not exist

example.com/idontexist

Then I want to first check a database to see if idontexist is in the database.

If it is then I want to route the user to

example.com/action/idontexist.

How can I do this?

回答1:

One solution would be to extend the CI_Router class with your own in application/core/MY_Router.php and just copy the method _set_routing() in your class. Your changes would go somewhere after routes.php file is included and set to $this->routes property, you can add your custom routes.

include(APPPATH.'config/routes'.EXT);
...
$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
unset($route);

//Get your custom routes:
$your_routes = $this->_get_custom_routes();
foreach($your_routes as $custom_route)
{
    $this->routes[$custom_route['your_regex_match']] = $custom_route['controller'].'/'.$custom_route['action'];
}

Of course you might not need this, but I hope it gives you some idea. This way you can add custom routes and since you will have to fetch them from database, consider caching them for better speed.

回答2:

I feel like this gets asked every week.

Open up your application/config/routes.php, then add something like this:

$route['^(:any)'] = "my_controller/get_article/$1";

Please note that it will route everything to a controller called action. If you have other controllers then you should add a route for them too (preferably placed before this one).

// EDIT: Using this you can goto http://your-site.com/secrets-of-internet-marketing and it will call the get_article function in the my_controller controller, and pass "secrets-of-internet-marketing" as the first argument. Which can then process with something like this:

public function get_article($article_name) { 
    // something like this: 
    $article = $this->article_model->get_model_by_name($article_name);
    $this->load->view('article', $article);
}