inputError.php

<?php
namespace Cocoframework\Web_Kernel\Html\Helper;

use Aura\Html\Helper\AbstractHelper;
use Aura\Input\Form;

class InputErrors extends AbstractHelper
{
    public function setIntl($intl)
    {
        $this->intl = $intl;
    }

    public function setUl($ul_helper)
    {
        $this->ul_helper = $ul_helper;
    }

    public function __invoke(Form $form, $field)
    {
        $errors = $form->getMessages($field);
        foreach ($errors as $error) {
            // $error
            
        }
    }
}

so you can call like echo $this->inputErrors($this->contact_form, 'email');