Is there a function to get the caption for an image in wordpress

If you are trying to get the caption while in a post you can echo it out inside your "the_post_thumbnail" tag.

<?php the_post_thumbnail();echo get_post(get_post_thumbnail_id())->post_excerpt; ?>

You can also use the same method to show the image description. This is a little better feature in WordPress 3.5

<?php the_post_thumbnail();echo get_post(get_post_thumbnail_id())->post_content; ?>

If you need to style the caption or description you can wrap it in a div like below.

<?php the_post_thumbnail();    echo '<div class="myDiv">' . get_post(get_post_thumbnail_id())->post_excerpt . '</div>'; ?>

Hope that helps.

wordpress image captions

Turns out captions are stored as post excerpts. So,

<?php echo $post->post_excerpt; ?>

will print out the caption if you are on the attachment image page (image.php in your theme) and inside the Loop.

wordpress image captions

Using Wordpress 4.8, this little guy worked for me:

<?php the_post_thumbnail_caption(); ?>

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