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URI routing causing incorrect function arguments. - El Forum - 11-10-2008

[eluser]Unknown[/eluser]
I have developed quite an extensive addon to the CodeIgniter codebase, and have come across quite a strange bug. There's quite a lot to get to explain the bug...

Firstly, I have a settings file in which I can specify 'virtual folders' within my application, which I include in the index.php file (in the root):

Code:
$settings = array(
    'virtual-folders' => array(
        'admin' => array(
            'prefix' => 'admin_',
            'theme' => 'default',
            'default' => 'users/admin_dashboard',
            'authenticate' => TRUE,
            'login' => 'admin/login',
            'logout' => 'admin/logout'
        )
    )
        ...
);

$GLOBALS['settings'] = $settings;

My intention is to use this to route '/admin/users/add' to 'users/admin_dashboard'. I then set up the routes.php file to look something like this:

Code:
$all = "([\w-]+)";
$any = "([\w/-]+)";

$ext = '';
$settings = $GLOBALS['settings'];

foreach ($settings['layouts'] as $key => $value) {
    if ($ext && ($key != 'default')) {
        $ext .= '|.' . $key;
    }
    else if ($key != 'default') {
        $ext .= '.' . $key;
    }
}
$ext = '(' . $ext . ')?';

$route['default_controller'] = $settings['general-settings']['default-route'];
$route['scaffolding_trigger'] = "";

$route['admin/login'] = 'users/admin_login';
$route['admin/logout'] = 'users/admin_logout';
$route['admin/dashboard'] = 'users/admin_dashboard';

foreach ($settings['virtual-folders'] as $key => $value) {
    $route[$key . '/' . $all . '/' . $any . $ext] = "$1/" . $value['prefix'] . "$2/$3";
    $route[$key . '/' . $any . $ext] = "$1/" . $value['prefix'] . "index";
    $route[$key] = $value['default'];
}

$route[$any . $ext] = "$1";

The problem is that when I set up a controller method that uses the automatic url to argument conversion (based on segmental positioning):

Code:
function admin_view($bob = 1, $page = 2) {
        $this->crumbs = array(
            'Adverts' => base_url() . 'admin/advertcampaigns/view',
            'Advert Types' => base_url() . 'admin/adverttypes/view'
        );
        
        print_r($bob);
        print_r($page);
        
        $this->adverttypes->select(array(
            'url' => base_url() . 'admin/adverttypes/view/',
            'limit' => 10,
            'page' => $page
        ));
    }

If I specify the first argument as an integer value (ex. '/testapp/admin/adverttypes/view/5') then $bob reflects a value of 5, $page reflects a value of 2.

If I omit the integer value (ex. '/testapp/admin/adverttypes/view/') then $bob reflects a value of 1, $page reflects a value of 5.

So, in plain terms, when I use this method of custom routing (which should render the routed segments in the same way as any other method) the arguments array differs when uri values are omitted.

Curious...