Just filter admin_post_thumbnail_html and append your checkbox HTML: add_filter( ‘admin_post_thumbnail_html’, ‘wpse_71501_thumbnail_options’ ); function wpse_71501_thumbnail_options( $html ) { return $html . <<<html <p> <label for=”big_thumbnail”> <input id=”big_thumbnail” name=”big_thumbnail” type=”checkbox” /> Use big thumbnail </label> </p> html; }
To answer your first question, the first chunk of code is specifically for adding more custom thumbnail sizes. Don’t let the word “thumbnail” trick you, in fact I use the function mentioned above to register large images that fit in very specific places in themes such as custom sized banners and things like that. In … Read more
Demo Plugin – Fixed Size Here’s one suggestion as a demo plugin (PHP 5.4+): <?php /* Plugin Name: Custom Playlist Thumb Size */ namespace WPSE238646\PlaylistThumbSize; add_shortcode( ‘playlist’, function( $atts = [], $content=”” ) { add_filter( ‘wp_get_attachment_image_src’, __NAMESPACE__ . ‘\\src’ , 10, 3 ); $out = wp_playlist_shortcode( $atts, $content ); remove_filter( ‘wp_get_attachment_image_src’, __NAMESPACE__ . ‘\\src’ ); … Read more
The first argument that get_previous_post and get_next_post is $in_same_cat. WordPress is looking for post of the same type in the current posts category. If your custom post type doesn’t support the category taxonomy, both functions are likely to return nothing for the previous and next post. Try calling both functions without arguments for your custom … Read more
You’re already looking in the right places. (And nowadays WordPress already supports PDF thumbnails through ImageMagick – code.) To add a new thumbnail generator, you’ll need to: write a new WP_Image_Editor class that supports the file type or types you want – you’ll want to extend the base class and override at least test() load() … Read more
Here is a list of some popular video grid plugins you can use without custom coding. You can create a grid of YouTube thumbnails that link to those videos. Gallery by Robo – Responsive Photo Image Gallery YouTube Gallery – Best YouTube Video Gallery for WordPress YourChannel: YouTube channel on your website Good luck!
You need to know your site’s current thumbnail dimension settings in order for you to detect if the $url is of thumbnail size. $thumbnail_width = get_option( ‘thumbnail_size_w’ ); $thumbnail_height = get_option( ‘thumbnail_size_h’ ); // The do detection // Assuming you have the image $url $pattern = ‘%’ . $thumbnail_width . ‘x’ . $thumbnail_height . ‘%’; … Read more
This filter will remove it completely from all images, you can add a conditional to only effect certain images. function remove_img_title($atts) { unset($atts[‘title’]); return $atts; } add_filter(‘wp_get_attachment_image_attributes’,’remove_img_title’); Instead if you want to use <?php the_post_thumbnail( ‘category-thumb’ ); ?> You can pass it an empty title using the second $attr so your title tag will look … Read more
Super late to the party, but well… If you want to show your featured image right under the Post title in your Admin area, use this piece of code in your functions.php : add_action(‘do_meta_boxes’, ‘my_cpt_move_meta_box’); function my_cpt_move_meta_box(){ remove_meta_box( ‘postimagediv’, ‘post_type’, ‘side’ ); add_meta_box(‘postimagediv’, __(‘custom name’), ‘post_thumbnail_meta_box’, ‘post_type’, ‘normal’, ‘high’); } Be sure to change post_type … Read more
Make a grid setup, with your guttering, and setup JQMasonry to appyl itself to everything in that grid. Then add image sizes for the sizes of tiles you want using add_image_size in functions.php. You will need to regenerate any existing image thumbnails after this has been done. Then finally display your posts. Use div elements … Read more