Come accedere ad una classa dentro un namespace?

[giannino1995]

Perché non riesco a stampare $dns?

<?php

namespace woo\controller {

    class ApplicationHelper {

        function getOptions() {
            if (!file_exists("data/woo_options_not_there.xml")) {
                throw new \woo\base\AppException(
                "Could not find options file");
            }
            $options = simplexml_load_file("data/woo_options.xml");
            $dsn = (string) $options->dsn;
            print $dns;
        }

    }

    $d = (new ApplicationHelper())->getOptions();
}

namespace woo\base {

    class AppException extends \Exception {
        
    }

}
?>

questo è l'errore:


Fatal error: Uncaught exception 'woo\base\AppException' with message 'Could not find options file' in C:\xampp\htdocs\9781430260318_Chapter_12_Code\list ing12.00.php:9 Stack trace: #0 C:\xampp\htdocs\9781430260318_Chapter_12_Code\list ing12.00.php(19): woo\controller\ApplicationHelper->getOptions() #1 {main} thrown in C:\xampp\htdocs\9781430260318_Chapter_12_Code\list ing12.00.php on line 9