#concrete5 Check the user already submitted on express form template

view.php

<?php
defined('C5_EXECUTE') or die('Access Denied.');

$app = \Concrete\Core\Support\Facade\Facade::getFacadeApplication();
/** @var \Concrete\Core\User\User $u */
$u = $app->make(\Concrete\Core\User\User::class);
$answered = 0;
if (isset($renderer) && is_object($renderer) && $u->isRegistered()) {
    $context = $renderer->getContext();
    if (is_object($context)) {
        /** @var \Concrete\Core\Entity\Express\Form $form */
        $form = $context->getForm();
        if (is_object($form)) {
            /** @var \Concrete\Core\Entity\Express\Entity $entity */
            $entity = $form->getEntity();

            $el = new \Concrete\Core\Express\EntryList($entity);
            $el->filterByAuthorUserID($u->getUserID());
            $answered = $el->getResults();
        }
    }
}

?>
<div class="ccm-block-express-form">
    <?php if ($answered) { ?>
        <?php if (isset($success)) { ?>
            <p><?= $success; ?></p>
        <?php } else { ?>
            <p><?= t('You already answered this survey. Thank you.'); ?></p>
        <?php } ?>
    <?php } elseif (isset($renderer)) {
        ?>
        <div class="ccm-form">...</div>
        <?php
    } else {
        ?>
        <p><?=t('This form is unavailable.'); ?></p>
        <?php
    } ?>
</div>