You also need to add it to image size chooser.You can do so using the filter image_size_names_choose. add_filter( ‘image_size_names_choose’, ‘wpse_228675_custom_size’ ); function wpse_228675_custom_size( $sizes ) { return array_merge( $sizes, array( ‘image_horizontal’ => __(‘Custom image size’), ) ); }
By default, when you upload an image via the admin, it’s metadata is added to the database, and that’s how you can search through them in the media library etc. If you upload images via ftp then they won’t appear in the DB so won’t show up in the admin area. Use a plugin such … Read more
Is there are better way to change this (annoying) variable please? The Twenty Sixteen theme provides you with the twentysixteen_content_width filter, where the default is 840. To modify it you should be able to use this within your child theme’s functions.php file: add_filter( ‘twentysixteen_content_width’, function( $content_width ) { // Override the default 840 content width … Read more
You could try the following, I havent tested it, so look out for typos or errors: $all_posts = get_posts(array( ‘numberposts’ => – 1, ‘post_status’ => ‘any’, ‘post_type’ => get_post_types(”, ‘names’) , )); foreach($all_posts as $all_post) { delete_post_media($all_post->ID); } function delete_post_media($post_id) { if (!isset($post_id)) return; elseif ($post_id == 0) return; elseif (is_array($post_id)) return; else { $attachments … Read more
You can register a new image size by using add_image_size() add_image_size( string $name, int $width, int $height, bool|array $crop = false ) Parameters $name (string) (Required) Image size identifier. $width (int) (Required) Image width in pixels. $height (int) (Required) Image height in pixels. $crop (bool|array) (Optional) Whether to crop images to specified width and height … Read more
I would like to automatically set the alternative text to be the same as the title of a post when image is uploaded. The attachment’s image alternative text is stored in the post meta table under the _wp_attachment_image_alt meta key. In media_handle_upload() and media_handle_sideload() we have: $id = wp_insert_attachment($attachment, $file, $post_id); if ( !is_wp_error($id) ) … Read more
WordPress wp_is_mobile() can be the function that you’re looking for. // Use the build-in function if WP if(wp_is_mobile()) // On mobile { the_post_thumbnail_url(‘featured-image-mobile’); } else { the_post_thumbnail_url(‘featured-image’); }
Instead of using the locationimage attribute, why not use the attachment ID? This will allow you to dynamically grab the URL to the file and will make getting other meta data such as the alt text much easier. Below is a rewritten version of hplocationsfn(). Usage example: [hpLocationSquare id=’2299′ link=’http://example.com’] Note that the link attribute … Read more
Here’s a solution that leverages the shortcode_atts_{shortcode} filter, where caption is the shortcode in this case. This works by pulling the attachment id from $out[‘id’] then getting the value of the class via get_post_meta( $attachment_id, ‘img_class_field’, true ). With this approach, it is not necessary to modify the output of the caption shortcode in the … Read more
Here’s an (untested) example where we inject into the header tag on attachment’s pages, the canonical link of the attached post: add_action( ‘wp_head’, ‘wpse_attachment_parent_canonical’ ); function wpse_attachment_parent_canonical() { // Only target attachment’s pages if( ! is_attachment() ) return; $object = get_queried_object(); // Make sure we’re dealing with a WP_Post object if ( ! is_a( $object, … Read more