CodeIgniter - Optional parameters

问题

I'm building my first CodeIgniter application and I need to make URLs like follows:

controllername/{uf}/{city}

Example: /rj/rio-de-janeiro This example should give me 2 parameters: $uf ('rj') and $city ('rio-de-janeiro')

Another URL possible is:

controllername/{uf}/{page}

Example: /rj/3 This example should give me 2 parameters: $uf ('rj') and $page (3)

In other words, the parameters "city" and "page" are optionals. I can't pass something like '/uf/city/page'. I need always or 'city' OR 'page'. But I don't know how to configure these routes in CodeIgniter configuration to point to same method (or even to different methods).

回答1:

I've found the correct result:

$route['controllername/(:any)/(:any)/(:num)'] = 'ddd/index/$1/$2/$3';
$route['controllername/(:any)/(:num)'] = 'ddd/index/$1/null/$2'; // try 'null' or '0' (zero)
$route['controllername/(:any)'] = 'ddd/index/$1';

The Index method (inside "ControllerName") should be:

public function Index($uf = '', $slug = '', $pag = 0)
{
    // some code...

    if (intval($pag) > 0)
    {
        // pagination
    }

    if (!empty($slug))
    {
        // slug manipulation
    }
}

Hope it helps someone. Thank you all.

回答2:

public function my_test_function($not_optional_param, $optional_param = NULL)
  { 
   //do your stuff here
  }

have you tried this?

回答3:

For example, let’s say you have a URI like this:

example.com/index.php/mycontroller/myfunction/hello/world
example.com/index.php/mycontroller/myfunction/hello

Your method will be passed URI segments 3 and 4 (“hello” and “world”):

class MyController extends CI_Controller {

public function myFunction($notOptional, $optional = NULL)
{
    echo $notOptional; // will return 'hello'.
    echo $optional; // will return 'world' using the 1st URI and 'NULL' using the 2nd.
}

}

Reference: https://codeigniter.com/user_guide/general/controllers.html

来源：https://stackoverflow.com/questions/18973178/codeigniter-optional-parameters

标签

php

codeigniter