Passing through errors in EE2

if ( ! empty($errors) )
{
	$msg = array();

	foreach ($errors AS $line)
	{
		$msg[] = $this->EE->lang->line($line);
	}

	$this->EE->session->set_flashdata('errors', $msg);
	$this->EE->functions->redirect($return_url);
	exit;
}