Uniform: combine error snippets

The CMS Questions
1

I use the uniform plugin for a contact and a newsletter form on my website. In the template, i use one of the following error snippets in case of wrong input:

  • form/error-contact
<?php if ($contactform->error($field)): ?>
  <p class="error"><?php echo implode('<br>', $contactform->error($field)) ?></p>
<?php endif; ?>
  • form/error-newsletter
<?php if ($newsletterform->error($field)): ?>
  <p class="error"><?php echo implode('<br>', $newsletterform->error($field)) ?></p>
<?php endif; ?>

The contents of both snippets is the same except the form variable. I would like to combine it to one snippet ‘form/error’ but can’t figure out how to check if the $contactform or $newsletterform variable exists and avoid an ‘undefined variable error’.

In case it is important: i use a hidden input form-id with value “contact” or “newsletter” to identify the form.

Any ideas?

2