# set inline error messages
$form->useInlineErrorMessages = true;
# init helper variable for messages. in case some message is stored in session, use it
if (!empty($_SESSION['message'])) {
$message = $_SESSION['message'];
$_SESSION['message'] = null;
} else {
$message = null;
}
# set onSubmit action
$form->onSubmit(function ($form, $isValid) {
if (!$isValid) {
$message = "Vall-I does not like inserted data, saying: " . implode(", ", $form->getErrorMessages());
} else {
# Here could be some backend logic, for example inserting into database etc... and then redirection
$message = "Vall-I is satisfied with the following data, good job!<pre>" . print_r($form->getData(), true) . "</pre>";
}
redirect("basics.php", $message);
}, get('data'));
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Basic usage of Vall-I</title>
<style>
.InvalidElement
{
border: 2px solid red;
}
</style>