in_form.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\UI\examples\Input\Field\File;
 
use ILIAS\UI\URLBuilder;
 
function in_form()
{
    // Step 0: Declare dependencies
    global $DIC;
    $ui = $DIC->ui()->factory();
    $http = $DIC->http();
    $renderer = $DIC->ui()->renderer();
    $request = $DIC->http()->request();
    $get_request = $http->wrapper()->query();
    $data_factory = new \ILIAS\Data\Factory();
 
    $example_uri = $data_factory->uri((string) $http->request()->getUri());
    $url_builder = new URLBuilder($example_uri);
    [$process_form_url_builder, $process_form_parameter] = $url_builder->acquireParameter(explode('\\', __NAMESPACE__), "process_single");
 
    // Step 1: Define the input field.
    // See the implementation of a UploadHandler in components/ILIAS/UI_/classes/class.ilUIDemoFileUploadHandlerGUI.php
    $file = $ui->input()->field()->file(new \ilUIDemoFileUploadHandlerGUI(), "File Upload", "You can drop your files here");
 
    // Step 2: Define the form and attach the field.
    $form = $ui->input()->container()->form()->standard(
        (string) $process_form_url_builder->withParameter($process_form_parameter, '1')->buildURI(),
        ['file' => $file]
    );
 
    // Step 3: Define some data processing.
    $result = '';
    if ($get_request->has($process_form_parameter->getName())) {
        $form = $form->withRequest($request);
        $result = $form->getData();
    }
 
    // Step 4: Render the form/result.
    return
        "<pre>" . print_r($result, true) . "</pre><br/>" .
        $renderer->render($form);
}