How to replace underscores in codeigniter url with dashes?

Question

I would like to know the simplest solution to changing the underscores of my codeigniter urls to dashes, for seo reasons.

My controllers look like:

publi         


        

Answer 1

What you could do is create a custom hook (PST... you need basic CodeIgniter skills): for more information regarding CodeIgniter Hooks - Extending the Framework Core

/*
 * the hooks must be enabled from the config file
 * replace underscore with dashes (hyphens) for SEO
 */

function prettyurls() {
    if (is_array($_GET) && count($_GET) == 1 && trim(key($_GET), '/') != '') {
        $newkey = str_replace('-', '_', key($_GET));
        $_GET[$newkey] = $_GET[key($_GET)];
        unset($_GET[key($_GET)]);
    }
    if (isset($_SERVER['PATH_INFO']))
        $_SERVER['PATH_INFO'] = str_replace('-', '_', $_SERVER['PATH_INFO']);
    if (isset($_SERVER['QUERY_STRING']))
        $_SERVER['QUERY_STRING'] = str_replace('-', '_', $_SERVER['QUERY_STRING']);
    if (isset($_SERVER['ORIG_PATH_INFO']))
        $_SERVER['ORIG_PATH_INFO'] = str_replace('-', '_', $_SERVER['ORIG_PATH_INFO']);
    if (isset($_SERVER['REQUEST_URI']))
        $_SERVER['REQUEST_URI'] = str_replace('-', '_', $_SERVER['REQUEST_URI']);
}

I named the file customhooks.php.

Then add this to the hooks.php file in application/config:

$hook['pre_system'] = array(
    'class' => '',
    'function' => 'prettyurls',
    'filename' => 'customhooks.php',
    'filepath' => 'hooks',
    'params' => array()
);

You will need to edit your application/config/config.php file to enable hooks

$config['enable_hooks'] = TRUE;

EXTRA:

so that when you use $this->uri->uri_string() it stays hyphenated do the following Creating Core System Classes

class MY_URI extends CI_URI {

    function uri_string() {
        return str_replace('_', '-', $this->uri_string);
    }

}