I got curious about the SQL way of finding all posts without any attachments. Method #1 – Sub query with NOT IN Here’s my first attempt to construct such a query: global $wpdb; $sql = ” SELECT p1.ID, p1.post_title FROM {$wpdb->posts} p1 WHERE p1.post_type=”post” AND p1.post_status=”publish” AND p1.ID NOT IN ( SELECT DISTINCT p2.post_parent FROM … Read more
you can do that by running the function set_post_thumbnail( $my_post_id, $thumbnail_id ); remember, you have to process and insert the image into the library first: $uploaddir = wp_upload_dir(); $file = $_FILES[ … whatever you have in your POST data … ]; $uploadfile = $uploaddir[‘path’] . “https://wordpress.stackexchange.com/” . basename( $file ); move_uploaded_file( $file , $uploadfile ); … Read more
Ok, all those hipercomplex functions can be reduced to one simple command: attachment_url_to_postid You only need to parse the image url to retrieve the attachment id: <?php $attachment_id = attachment_url_to_postid( $image_url ); echo $attachment_id; ?> That’s all you need.
WP does not do this by default since there is no guarantee that attachment isn’t still being used by some other post. Basic logic would be to hook into delete_post, query for child attachments and run wp_delete_attachment() on each. I did quick search in plugin repository and came up with tiny plugin that does just … Read more
From the WP-CLI documentation about wp post delete: wp post delete –force $(wp post list –post_type=”attachment” –format=ids) See wp post list for additional information.
I have tested this with an image I created myself with Photoshop where I inserted the word “Süss” in every thinkable IPTC field. I uploaded it to my WordPress 4.6 installation, which has no image handling plugins installed. The uploading went smoothly, the right thumbnails were created in the uploads directory and the caption field … Read more
add_filter( ‘the_content’, ‘attachment_image_link_remove_filter’ ); function attachment_image_link_remove_filter( $content ) { $content = preg_replace( array(‘{<a(.*?)(wp-att|wp-content\/uploads)[^>]*><img}’, ‘{ wp-image-[0-9]*” /></a>}’), array(‘<img’,'” />’), $content ); return $content; } The regex could be simpler and unfortunately this also deprives you of the unique wp-image-xxx (where xxx is the attachment ID) class of the <img> tag, but it’s the safest one I … Read more
This isn’t really a WordPress question – but you can add a rewrite rule to prevent access unless the referrer is your own domain. [Update] You’ll need to do 2 things Add a rewrite rule (either directly with .htaccess or by using WP_rewrite (Codex reference). The aim here is to deny requests to your documents … Read more
If you only want to add an extra class, then you should use wp_get_attachment_image. It has few extra params, and the last one is used for setting class names. Sample usage: <?php echo wp_get_attachment_image( get_the_ID(), ‘thumbnail’, “”, [“class” => “my-custom-class”] ); ?> The main advantage of this aproach is that you will also get the … Read more
I have checked your code, and I think you are missing the guid of the images. Please have a look at the code below: $post_id = 1234; $images = array(‘filename1.png’, ‘filename2.png’, … ‘filename10.png’); // Get the path to the upload directory. $wp_upload_dir = wp_upload_dir(); foreach($images as $name) { $attachment = array( ‘guid’=> $wp_upload_dir[‘url’] . “https://wordpress.stackexchange.com/” … Read more