For unattached images, the post_parent column in the wp_posts table, has the value of 0. Your gallery shortcode in that case is: which means you are calling get_children() with post_parent as 0. You can e.g. use the gallery shortcode callback gallery_shortcode() directly: if( $parent_id = $post->post_parent ) { echo gallery_shortcode( [ ‘id’ => (int) $parent_id, … Read more
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
The post that an attachment is related to is determined by the post_parent column on the wp_posts table (depending on your database prefix). Set it to the post_ID of the parent post.
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( $authors_post->ID );
I’m not entirely sure what your intentions are for the code, and unfortunately i didn’t find what you provided worked very well, so i rewrote parts of the code supplied to make it into a more workable solution. This code will work for saving the attachment order in the metabox on save, not via ajax, … Read more
You can set the uploaded image as the post thumbnail via, update_post_meta($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
Yes you can do this! Is it simple/easy? Sort of… Is it fast and scalable? Oh dear god no 😱. The Super Expensive Solution The solution here is this function: $post_id = url_to_postid( $url ); The problem is that this is a very slow function that’s expensive to call. If you call this when displaying … Read more
Maybe this works function remove_post() { if(isset($_POST[‘post_id’]) && is_numeric($_POST[‘post_id’])) { $post = get_post($_POST[‘post_id’]); if(get_current_user_id() == $post->post_author) { $args = array( ‘post_parent’ => $_POST[‘post_id’] ); $post_attachments = get_children($args); if($post_attachments) { foreach ($post_attachments as $attachment) { wp_delete_attachment($attachment->ID, true); } } wp_delete_post($_POST[‘post_id’], true); } } exit; } The code added function get_attachment_id_from_src ($image_src) { global $wpdb; $query = … Read more
When inside of the media uploaded in the post edit screen, just search for your previously attached media and embed it in your new post. The relationship between posts and attachments is preserved in the database. While an attachment can only belong to one post, it can still be embedded in many posts without worry.
Second pass. Known issues: Needs caching (and the cache needs to be tidied up where possible) Post types are hard-coded Which post statuses are we interested in? Here’s the function: /** * Given an attachment ID, searches for any post with that attachment used * as a featured image, or if it is present in … Read more