post-thumbnails - Read For Learn

Exclude featured image from gallery code stops Lightbox from working

I solved this by using this code function exclude_thumbnail_from_gallery($null, $attr) { if (!$thumbnail_ID = get_post_thumbnail_id()) return $null; // no point carrying on if no thumbnail ID // temporarily remove the filter, otherwise endless loop! remove_filter(‘post_gallery’, ‘exclude_thumbnail_from_gallery’); // pop in our excluded thumbnail if (!isset($attr[‘exclude’]) || empty($attr[‘exclude’])) $attr[‘exclude’] = array($thumbnail_ID); elseif (is_array($attr[‘exclude’])) $attr[‘exclude’][] = $thumbnail_ID; // … Read more

Migrating problem – featured images

The_post_thumbnail is a function that “runs” on the “theme” side of things.. not the DB. in short – you need to have a theme that supports post thumbnails . That means , to have it work – you need the SAME theme when migrating to be functional , OR adapt the new one. Open your … Read more

Single post layout based on featured image size

The problem there is that the WP uploader will automatically resize any image you upload to all your specified image sizes, providing the original is larger than the specified size. Relying on uploading an image between two specific sizes is a very flimsy mechanism for dictating layout. What is actually different about the content of … Read more

Muliple featured images (or just images) per post

Take a look at this Q.

Using thumbnail functions inside a shortcode

In order to use that function you need to declare this in your theme. add_theme_support( ‘post-thumbnails’ ); I tested your code and it works fine, the only way I can duplicate your error is to remove the above. It might also be because you seem to be using a CPT called “photos”, have you made … Read more

Aligning the thumbnail image

<?php echo get_the_post_thumbnail($id, ‘thumbnail’, array(‘class’ => ‘alignleft’)); ?> see codex for more

Archive show thumbnail

You can check if the post as a thumbnail and if not the get the first image in the post ex: <?php $size=”thumbnail”; if ( has_post_thumbnail() ) { ?> <a href=”https://wordpress.stackexchange.com/questions/58503/<?php the_permalink(); ?>” title=”<?php the_title_attribute(); ?>” > <?php the_post_thumbnail($size, array(‘class’ => ‘alignleft’)); ?> <?php } else { $attachments = get_children( array( ‘post_parent’ => get_the_ID(), ‘post_status’ … Read more

Adding Videos as post-thumbnails (no stills, just the player in a smaller size)

You could make a plugin which adds a meta box in admin, where you can add a link to a youtube/vimeo video. The plugin should then save the url as meta data for that article when the article is saved. When listing the articles (or viewing a single one), check if the meta data value … Read more

Sidebar Thumbs Squished?

Had to regenerate all thumbnails. The name of the plugin is “regenerate thumbnails” for those that may run into a similar issue

Retrieve post thumbnail as array

The solution is to use wp_get_attachment_image_src. As per the Codex: $attachment_id = 8; $size=”full”; // returns an array $image_attributes = wp_get_attachment_image_src( $attachment_id, $size ); Although the return is said to be: [0] => url [1] => width [2] => height There is a fourth element that indicates if it is the full image (false) or … Read more

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