Uncaught exception with namespace - php

Question

I am reading a book about php and I found this script that doesn't work:
namespace woo\controller {
// woo\controller\ApplicationHelper;
class ApplicationHelper {
function getOptions() {
if (!file_exists("data/woo_options_not_there.xml")) {
$r = new \woo\base\AppException("Non riesco ad aprire il file<br>");
throw new $r;
}
$options = simplexml_load_file("data/woo_options.xml");
$dsn = (string) $options->dsn;
print $dsn;
}
}
$d = (new ApplicationHelper())->getOptions();
}
namespace woo\base {
class AppException extends \Exception {
}
}
Can you help me?
This is the mistake:
Fatal error: Uncaught exception 'woo\base\AppException' in C:\xampp\htdocs\9781430260318_Chapter_12_Code\listing12.00.php:11 Stack trace: #0 C:\xampp\htdocs\9781430260318_Chapter_12_Code\listing12.00.php(20): woo\controller\ApplicationHelper->getOptions() #1 {main} thrown in C:\xampp\htdocs\9781430260318_Chapter_12_Code\listing12.00.php on line 11

Answer 1

So let's follow the train of logic here
We're creating the class ApplicationHelper and then instantiating it. Then, we call getOptions() which looks for an XML file and, if it doesn't find it, throws an exception.
Your code is working fine, you just forgot to catch the exception (this produces a fatal PHP error)
try {
$d = (new ApplicationHelper())->getOptions();
} catch(\woo\base\AppException $err) {
echo 'Error: ' . $err->getMessage();
}