<a href="<?= base_url('uploads/signature/' . $visitor->signature) ?>" data-title="Signature for <?= join(' ', [$visitor->first_name, $visitor->last_name]) ?>" data-lightbox="<?= $visitor->signature ?>" data-alt="Signature for <?= join(' ', [$visitor->first_name, $visitor->last_name]) ?>">
    <i class="fa fa-fw fa-eye"></i>
</a>