Show specific text if fallback image is used instead featured image

Hi there,

try this method:

<?php 
$thumb_id = get_post_thumbnail_id( get_the_ID() ); 
if ($thumb_id): 
?>
  // if thumbnail is present return thumbnail caption here
<?php else: ?>
  // return fallback caption here
<?php endif; ?>

Makes no difference.
The right caption is shown when there's no featured image.
Both captions are showing when there is a featured image.

Try checking first to see if the post has a thumbnail then run your conditions.
Something like this:

global $post;
if (has_post_thumbnail( $post->ID ) ){   
	get_the_post_thumbnail($post->ID); 
	// Return your featured omage caption here
} elseif {
	// Return your fallback caption here
}

This gives an error. part of the php code gets printed
ID) ){ get_the_post_thumbnail($post->ID); ?>
along with both captions when there is a featured image
and the fallback caption if there's no featured image.

Hi there,

Can you share the full code that causes this?

Normally when a part of the code is printed out, it means there's a syntax issue. Usually related to delimiters.

Full code:

<?php global $post; if (has_post_thumbnail($post->ID) ){ get_the_post_thumbnail($post->ID); ?>
<p style="font-size:75%;float:right;margin-right:10px;margin-top:-20px;"><span>{{custom_field.credit}}</span></p>
<?php } elseif { ?>
<p style="font-size:75%;float:right;margin-right:10px;margin-top:-20px;">
	<span>Foto af <strong><a href="https://www.pexels.com/da-dk/@brett-sayles?utm_content=attributionCopyText&utm_medium=referral&utm_source=pexels">Brett Sayles</a></strong> fra <strong><a href="https://www.pexels.com/da-dk/foto/trae-kunst-vaeg-design-2850290/?utm_content=attributionCopyText&utm_medium=referral&utm_source=pexels">Pexels</a></strong></span>
</p>
<?php } ?>

Sorry about this - i just realised you're wanting to output this in a Header Element - which doesn't support PHP by default. Instead you would need to register a shortcode like this:

add_shortcode( 'featured_caption', 'db_featured_image_caption' );
function db_featured_image_caption() {
	global $post;
	ob_start();
	if ( has_post_thumbnail( $post->ID )) {
		$caption = get_post_meta(get_the_ID(), 'caption', true); 
		$content = '<p class="featured-caption">' . $caption . '</p>';
	} else {
		$content = '<p class="featured-caption"> The fallback caption here </p>';
	}
	ob_end_clean();
	return $content;
}

Then you would add just the shortcode [featured_caption] in your Header Element.

It works fine for when there's no featured image present, but how do i get this:
<p style="font-size:75%;float:right;margin-right:10px;margin-top:-20px;"><span>{{custom_field.credit}}</span></p>
into the output for when a featured image is present?

This part of the code will automatically display the content of the caption custom field that you have set in the post editor:

if ( has_post_thumbnail( $post->ID )) {
	$caption = get_post_meta(get_the_ID(), 'caption', true); 
	$content = '<p class="featured-caption">' . $caption . '</p>';
}

Where is the caption custom field being set ?

Bingo!
I just needed to put the name of my custom field (credit) instead of your word (caption).
Now it works just like I want. Thanks so much for your help.

Oops - my bad :) Glad to hear its working!