get error messages from Form element symfony 2.0

FormUtil.php

<?php

namespace Company\YourBundle\Util;

/**
 * FormUtil
 *
 * This class was created to add Form resusable functions
 *
 */
class FormUtil
{
    /**
     * Extract error messages from Form.
     * @param Form $form
     *
     * @return array
     *
    */
    public static function getErrorMessages(\Symfony\Component\Form\Form $form)
    {
        $errors = array();
        foreach ($form->getErrors() as $key => $error) {
            $template = $error->getMessageTemplate();
            $parameters = $error->getMessageParameters();

            foreach ($parameters as $var => $value) {
                $template = str_replace($var, $value, $template);
            }

            $errors[$key] = $template;
        }
        if ($form->hasChildren()) {
            foreach ($form->getChildren() as $child) {
                if (!$child->isValid()) {
                    $errors[$child->getName()] = self::getErrorMessages($child);
                }
            }
        }

        return $errors;
    }

}