This should hopefully do the trick: /** * Append the image categories to the current image class. * * @see http://wordpress.stackexchange.com/a/156576/26350 */ add_filter( ‘get_image_tag_class’, function( $class, $id, $align, $size ) { foreach( (array) get_the_category( $id ) as $cat ) { $class .= ‘ category-‘ . $cat->slug; } return $class; } , 10, 4 ); Testing … Read more
You can hook into the filter img_caption_shortcode and replace the whole captioned image. Here I’ve copied the caption shortcode function from WP4.5, left the version used if your theme declares HTML5 support as it is (using figcaption) and modified the non-HTML5 version to use h2. function wpse_233354_img_caption_shortcode( $empty, $attr, $content = null ) { // … Read more
Do I understand right that you mean featured thumbnail image for a post and not just any attached image? See get_the_post_thumbnail() function and your usage will be something like this: $output .= get_the_post_thumbnail( $authors_post->ID );
You can set the uploaded image as the post thumbnail via, update_post_meta($post_id,’_thumbnail_id’,$attach_id); Example… if ($_FILES) { foreach ($_FILES as $file => $array) { if ($_FILES[$file][‘error’] !== UPLOAD_ERR_OK) { return “upload error : ” . $_FILES[$file][‘error’]; } $attach_id = media_handle_upload( $file, $post_id ); } } update_post_meta($post_id,’_thumbnail_id’,$attach_id); If you are uploading an array of images, then you … Read more
I had the same problem – how can I display all the images from a post containing a gallery where some of the images are not attached to the post, or are attached to different posts? The new media interface in WP3.5 allows you to add any of the images in the media library to … Read more
The set_post_thumbnail function uses the metadata functions to set the featured image. You have two actions to hook into that process: EDIT: The action hooks are now defined different Thanks @dalbaeb! update_postmeta, before the data is written into the database. Previously update_post_meta updated_postmeta, after the data is written into the database. Previously updated_post_meta SECOND EDIT: … Read more
I found the same issue here and the solution from there works. The solution is as simple as pasting this: $content_width = 2000;// Value higher than your new ‘large’ width in functions.php Explanation copied from there(user Chip Bennett): I believe your issue is that the value set for the global $content_width variable (which is 640px … Read more
You won’t be really able to tell which context the image is being used in in the wp_get_attachment_image_attributes filter, but you can pass custom attributes to wp_get_attachment_image() in the template directly with the 4th argument. Then you can use wp_get_attachment_image_url() and wp_get_attachment_image_srcset() to get the values for those attributes: $image = get_field(‘image’); $size=”gallery”; echo wp_get_attachment_image( … Read more
ZipArchive->addFile() method expects local path to file, while wp_get_attachment_url() returns URL. You need to build local path for file from URL or in other way.
Misspelling of thumbnail (thumnail) in the if statement. Also get_the_post_thumbnail does echo the thumbnail, but just returns the html. You need to echo it. Also, for checking if a post has a thumbnail, you can use has_post_thumbnail. if ( has_post_thumbnail($r->ID)) { echo get_the_post_thumbnail($r->ID, array(50,50)); }else{ echo ‘<img src=”https://wordpress.stackexchange.com/questions/44208/image_url”/>’; }