Fallback Featured Image

[maharzan]

I have been trying to learn making block base themes and encountered a simple issue. I need to show a default fallback image if the posts have no featured images.

Obviously, with older/current method, we can do it something like this

<?php if ( has_post_thumbnail() ) {
 the_post_thumbnail();
 } else { ?>
 <img src="<?php bloginfo('template_directory'); ?>/images/default-image.jpg" alt="<?php the_title(); ?>" />
 <?php } ?>

But with blocks and new html templates, I can only do

<!-- wp:post-featured-image {"isLink":true} /-->

Further digging down the files, I saw this file and line was extracting the featured image and I didn't see any hooks in there so I can try to replace it in functions.php

https://github.com/WordPress/gutenberg/blob/trunk/packages/block-library/src/post-featured-image/index.php#L24

Is this possible in any other way? If not, I guess it would be really nice to have a hook in there so we can apply a default featured image on new block based themes.

[paaljoachim]

Hi @maharzan Chandra

I will call this an associated issue:
There has been some explorations here (linking to my comment):
#13795 (comment)
Where I explored setting the first image in the post/page as a featured image.

[maharzan]

I wonder why such simple things has become so complex nowadays..

[paaljoachim]

We should think out a simpler solution and present it..:)

[justintadlock]

For now, you could just use the post_thumbnail_html hook: https://developer.wordpress.org/reference/hooks/post_thumbnail_html/

[altivero]

I think this should be the default setting as outlined in the issue I created about this here: #31849

[maharzan]

For now, you could just use the post_thumbnail_html hook: https://developer.wordpress.org/reference/hooks/post_thumbnail_html/

Thanks @justintadlock. That seems to do the trick.

[ntsekouras]

Thanks for reporting @maharzan and @justintadlock for pointing out the proper filter: #32447 (comment).

I'll close this now as related discussions here are tracked in separate issues.

[paaljoachim]

Hey Nik @ntsekouras

I believe we might need to open this issue again, as the associated issue:
Add option to set as feature image to image / cover block - has been closed.
#13795

I believe there still are aspects needed to be looked closer at in both issues.

[paaljoachim]

I went ahead and reopened this issue.

[skorasaurus]

While triaging, I found this also to be reported at #34865 with a bit of discussion there as well so I am closing this issue. Please follow that issue for further updates and to share any opinions that you have.