Code Example

Hi,

You can create a download link for the PDF with the following snippet:

<?php $id = get_the_ID(); ?>
<a href="<?php echo wp_get_attachment_url($id); ?>">
    <?php echo get_the_post_thumbnail($id); ?>
</a>

Replace $id with ID of the PDF attachment you are interested in linking to. The example assumes that you are in “The Loop”, viewing an attachment page.

The plugin should not cause any problems from ACF as far as i know. Thumbnails are saved as normal uploads in the media library.

The thumbnail is automatically attached to the PDF as a “featured image” when PDF is uploaded. No need to perform additional steps here.

I’m using the following on the page which should show the PDF thumbnail.
https://bit.ly/1vwydDl

I can’t figure how to get the attachment ID for the attachment on this page. I manually put the ID for a moment and works.
Also, will this work if I have multiple PDF’s on the same page (which I intend to).

if( have_rows('pdf_files') ): ?>

    <ul>

    <?php while( have_rows('pdf_files') ): the_row(); ?>

        <li><?php the_sub_field('case_study_pdf'); ?></li>

        <?php $id = 31510; ?>
        <a href="<?php echo wp_get_attachment_url($id); ?>">
            <?php echo get_the_post_thumbnail($id); ?>
        </a>

    <?php endwhile; ?>

    </ul>

<?php

    elseif( !empty($old_pdf1) ):
    the_field('old_pdf_file_1');
?>

<?php endif; ?>

Yes, this will work if you have multiple PDF’s on the same page. PDF thumbnails are implemented as Post_Thumbnails for attachments and can be used in the same way.

I have never used ACF, so I’m not familiar with the API you’re using. However, I found some documentation for the ACF File field. To get the attachment ID, you need to set Return Value to Attachment ID instead of File URL. The preceding link has an example of how you can proceed, in short, use $attachment_id = get_field('case_study_pdf'); to get the $id after setting Return Value to Attachment ID in the field configuration screen.

Hi guys – I have the exact same setup using ACF. However, I can’t get anything at all to render. I double-checked that both GS and Imagick are installed, etc. Any thoughts? I even tried manually setting the ID. Still no dice. Thoughts?

Update: I figured it out. I deleted my PDFs and re-uploaded (since I installed the plugin after I uploaded my original PDFs) and the thumbnails were created.