Symfony 1.4 base form class with a method to output all errors of a Form in one array

MyBaseForm.class.php

<?php

class MyBaseForm extends sfFormSymfony
{
    public function getErrors()
    {
        $errors = array();

        foreach ($this as $form_field)
        {
            if ($form_field->hasError())
            {
                $error_obj = $form_field->getError();
                if ($error_obj instanceof sfValidatorErrorSchema)
                {
                    foreach ($error_obj->getErrors() as $error)
                    {
                        $errors[$form_field->getName()] = $error->getMessage();
                    }
                } 
                else
                {
                    $errors[$form_field->getName()] = $error_obj->getMessage();
                }
            }
        }

        foreach ($this->getGlobalErrors() as $validator_error)
        {
            $errors[] = $validator_error->getMessage();
        }

        return $errors;
    }
}