forms_bundle/examples/active_form.php

<?php
require_once __DIR__ . "/vendor/autoload.php";

$form = new \itguild\forms\ActiveForm();
$form->beginForm("/some_action");
$form->field(class: \itguild\forms\inputs\File::class, name: "login", params: [
    'class' => "form-control",
    'placeholder' => 'Логин',
])
    ->setLabel("Логин")
    ->render();

$form->endForm();