3 declare(strict_types=1);
    20     $ui = $DIC->ui()->factory();
    22     $request = $DIC->http()->request();
    25     $checkbox_input = $ui->input()->field()->checkbox(
"Checkbox", 
"Cannot check.")
    29     $form = $ui->input()->container()->form()->standard(
'#', [ $checkbox_input]);
    33     if ($request->getMethod() == 
"POST") {
    34         $form = $form->withRequest($request);
    35         $result = $form->getData();
    37         $result = 
"No result yet.";
    42         "<pre>" . print_r($result, 
true) . 
"</pre><br/>" .