function validate_custom($path, $filtered, $args)
{
echo "path: {$path}\n";
echo "value: ";
var_export($filtered);
echo "\n";
echo "args: ";
var_export($args);
echo "\n";
$valid_if_true = $filtered === $args;
\AIIX\Form::msgIfFalse($valid_if_true, $path, 123, 'custom key');
}