base.php

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<?php
function base()
{

    //Step 0: Declare dependencies
    global $DIC;

    $ui = $DIC->ui()->factory();
    $renderer = $DIC->ui()->renderer();
    $request = $DIC->http()->request();
    $ctrl = $DIC->ctrl();


    //Step 1: define the input
    $duration = $ui->input()->field()->duration("Pick a time-span", "This is the byline text");
    $time = $duration->withTimeOnly(true)->withRequired(true);
    $timezone = $duration
        ->withTimezone('America/El_Salvador')
        ->withUseTime(true)
        ->withByline('timezone and both time and date');

    //Step 2: define form and form actions, attach the input
    $form = $ui->input()->container()->form()->standard(
        '#',
        [
            'duration' => $duration,
            'time' => $time,
            'timezone' => $timezone,
            'disabled' => $duration->withLabel('disabled')->withDisabled(true)
        ]
    );

    $result = "";
    
    //Step 3: implement some form data processing.
    if ($request->getMethod() == "POST") {
        $form = $form->withRequest($request);
        $groups = $form->getInputs();
        foreach ($groups as $group) {
            if ($group->getError()) {
                $result = $group->getError();
            } else {
                //The result is sumarized through the transformation
                $result = $form->getData();
            }
        }
    } else {
        $result = "No result yet.";
    }

    //Step 4: Render the form.
    return
        "<pre>" . print_r($result, true) . "</pre><br/>" .
        $renderer->render($form);
}